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List of open source code libraries
open-in-new
List of open-source code libraries<a class="footnote-ref" id="fnref:1" href="#fn:1"><sup>1</sup></a><a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a><a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a><table><tbody><tr><th>Library Name</th><th>Programming Language</th><th>Open Source License</th></tr><tr><td><a href="/facts/Accord.NET/qpuljvtx">Accord.NET libraries</a></td><td><a href="/facts/C_Sharp_/UC2gxeyb">C#</a></td><td><a href="/facts/LGPL/AXwkz9x3">LGPLv3</a>, <a href="/facts/GPL/S75KhLSX">GPLv3</a></td></tr><tr><td><a href="/facts/Apache_Lucene/tPQ0D39Y">Apache Lucene</a></td><td>C#</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/ASP.NET_Core/t93JjWxg">ASP.NET Core</a></td><td>C#</td><td>MIT</td></tr><tr><td><a href="/facts/Dapper_ORM/UpeFCS8R">Dapper ORM</a></td><td>C#</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/EDXL_Sharp/2IXXlmAg">EDXL Sharp</a></td><td>C#</td><td>MIT</td></tr><tr><td><a href="/facts/Framework_Class_Library/DtSqC9YS">Framework Class Library</a></td><td>C#</td><td>MIT</td></tr><tr><td><a href="/facts/Infer.NET/ppVMvRg0">Infer.NET</a></td><td>C#</td><td>MIT</td></tr><tr><td><a href="/facts/Math.NET_Numerics/1n4Ixm0u">Math.NET Numerics</a></td><td>C#</td><td>MIT</td></tr><tr><td><a href="/facts/ML.NET/VT9L7fwH">ML.NET</a></td><td>C#</td><td>MIT</td></tr><tr><td><a href="/facts/NHibernate/L67Dkwuf">NHibernate</a></td><td>C#</td><td>LGPL-2.1</td></tr><tr><td><a href="/facts/OpenTK/By2ocWWl">OpenTK</a></td><td>C#</td><td>MIT</td></tr><tr><td><a href="/facts/SignalR/UcFsp4eb">SignalR</a></td><td>C#</td><td>MIT</td></tr><tr><td><a href="/facts/Standard_Libraries_(CLI)/sbGvv2nB">Standard Libraries (CLI)</a></td><td>C#</td><td>MIT</td></tr><tr><td><a href="/facts/Apache_Portable_Runtime/3wyRWMGo">Apache Portable Runtime</a></td><td><a href="/facts/C_/Ky2No763">C</a></td><td>Apache License 2.0</td></tr><tr><td><a href="/facts/Automatically_Tuned_Linear_Algebra_Software/p9BorAJr">Automatically Tuned Linear Algebra Software</a></td><td>C, <a href="/facts/Fortran/m1KqjcMU">Fortran</a></td><td>BSD License</td></tr><tr><td><a href="/facts/Binary_File_Descriptor_library/ctHcXxcd">Binary File Descriptor library</a></td><td>C</td><td>LGPL-2.1-or-later</td></tr><tr><td><a href="/facts/C_POSIX_library/mQkSt234">C POSIX library</a></td><td>C</td><td>LGPL, MIT, BSD</td></tr><tr><td><a href="/facts/C_standard_library/qdG1nW2c">C standard library</a> (libc)</td><td>C</td><td>ISO/IEC 9899</td></tr><tr><td><a href="/facts/Cairo_(graphics)/FuAWHozI">Cairo</a></td><td>C</td><td>GPLv2</td></tr><tr><td><a href="/facts/Chipmunk_(software)/pFeT0RXd">Chipmunk</a></td><td>C</td><td>MIT</td></tr><tr><td><a href="/facts/Core_Foundation/mWDmymXU">Core Foundation</a></td><td>C</td><td><a href="/facts/Apple_Public_Source_License/sujXlYJA">Apple Public Source License</a></td></tr><tr><td><a href="/facts/DirectFB/LcCkaDg1">DirectFB</a></td><td>C</td><td>LGPL-2.1</td></tr><tr><td><a href="/facts/Expat_(software)/hLTatDp3">Expat</a></td><td>C</td><td>MIT</td></tr><tr><td><a href="/facts/Fast_Artificial_Neural_Network/yVysNMBl">Fast Artificial Neural Network</a></td><td>C</td><td>GPL</td></tr><tr><td><a href="/facts/FFmpeg/85yf3kHI">FFmpeg</a></td><td>C</td><td>LGPL/GPL</td></tr><tr><td><a href="/facts/FreeTDS/Mz6ySC2n">FreeTDS</a></td><td>C</td><td>MIT</td></tr><tr><td><a href="/facts/FreeType/tCw3bSxv">FreeType</a></td><td>C</td><td>FTL</td></tr><tr><td><a href="/facts/Fontconfig/9Kmk5H9M">Fontconfig</a></td><td>C</td><td>MIT</td></tr><tr><td><a href="/facts/GD_Graphics_Library/1z1e1GbG">GD Graphics Library</a></td><td>C</td><td>MIT</td></tr><tr><td><a href="/facts/GDK/urAJHtRe">GDK</a></td><td>C</td><td>LGPL-2.1</td></tr><tr><td><a href="/facts/GEGL/Wwnl0LUz">GEGL</a></td><td>C</td><td>GPL-3.0</td></tr><tr><td><a href="/facts/GIO_(software)/XIydwk2l">GIO</a></td><td>C</td><td>LGPL-2.1</td></tr><tr><td><a href="/facts/GLib/X0r95Tgn">GLib</a></td><td>C</td><td><a href="/facts/GNU_Lesser_General_Public_License/AXwkz9x3">LGPLv2.1</a></td></tr><tr><td><a href="/facts/GNet/Yjnq73Hg">GNet</a></td><td>C</td><td>LGPL-2.1</td></tr><tr><td><a href="/facts/GNU_C_Library/AL6IYDkA">glibc</a></td><td>C</td><td>LGPL-2.1-or-later</td></tr><tr><td><a href="/facts/GNU_Libtool/nz8UBcCj">GNU Libtool</a></td><td>C</td><td>GPL-3.0</td></tr><tr><td><a href="/facts/GNU_Multiple_Precision_Arithmetic_Library/ldrpmQPR">GNU Multiple Precision Arithmetic Library</a></td><td>C</td><td>GPL-3.0</td></tr><tr><td><a href="/facts/Gnulib/TjwWUNIK">GNU portability library</a></td><td>C</td><td>GPL-3.0</td></tr><tr><td><a href="/facts/GNU_Portable_Threads/A3fd81Is">GNU Portable Threads</a></td><td>C</td><td>LGPL-2.0</td></tr><tr><td><a href="/facts/GNU_Readline/tEBE5Mam">GNU Readline</a></td><td>C</td><td>GPL-3.0-or-later</td></tr><tr><td><a href="/facts/GNU_Scientific_Library/WKX9L554">GNU Scientific Library</a></td><td>C</td><td>GPL</td></tr><tr><td><a href="/facts/GnuTLS/y3fYe3RI">GnuTLS</a></td><td>C</td><td>LGPL-2.1-or-later</td></tr><tr><td><a href="/facts/GObject/FEF00XSx">GObject</a></td><td>C</td><td>LGPL</td></tr><tr><td><a href="/facts/GTK/oLpVm9pp">GTK library</a></td><td>C</td><td>LGPL-2.1+</td></tr><tr><td><a href="/facts/GTK_Scene_Graph_Kit/awvXl29R">GTK Scene Graph Kit</a></td><td>C</td><td>LGPL-2.1</td></tr><tr><td><a href="/facts/IUP_(software)/hSN0nMeW">IUP</a></td><td>C</td><td>MIT</td></tr><tr><td><a href="/facts/Libart/qe3EhptL">Libart</a></td><td>C</td><td>LGPL-2.0-or-later</td></tr><tr><td><a href="/facts/Libavcodec/69SFWWvw">libavcodec</a></td><td>C</td><td>LGPL-2.1</td></tr><tr><td><a href="/facts/Libcurl/01m2dW2j">libcurl</a></td><td>C</td><td>curl License/MIT</td></tr><tr><td><a href="/facts/Libdca/dmbDDPS9">libdca</a></td><td>C</td><td>GPL-2.0</td></tr><tr><td><a href="/facts/Libevent/XCbgWGHn">libevent</a></td><td>C</td><td>MIT</td></tr><tr><td><a href="/facts/Libffi/9oFRnwFn">libffi</a></td><td>C</td><td>MIT</td></tr><tr><td><a href="/facts/Libfixmath/gC1SFRsw">libfixmath</a></td><td>C</td><td>MIT</td></tr><tr><td><a href="/facts/Libjpeg/lWr9T19K">libjpeg</a></td><td>C</td><td>Custom BSD-like</td></tr><tr><td><a href="/facts/Pcap/3FGCSqBf">Libpcap</a></td><td>C</td><td>BSD-3-Clause</td></tr><tr><td><a href="/facts/Libpng/atAlsNX0">libpng</a></td><td>C</td><td>libpng License</td></tr><tr><td><a href="/facts/LibRaw/ufu2zh47">LibRaw</a></td><td>C</td><td>GPL-2.0</td></tr><tr><td><a href="/facts/LibreDWG/2DdQoJF7">LibreDWG</a></td><td>C</td><td>GPL-3.0</td></tr><tr><td><a href="/facts/LibreSSL/9UnXD0lm">LibreSSL</a></td><td>C</td><td>ISC</td></tr><tr><td><a href="/facts/Librsvg/2mCkCesT">Librsvg</a></td><td>C</td><td>LGPL-2.1</td></tr><tr><td><a href="/facts/Libsndfile/5bjre8ol">libsndfile</a></td><td>C</td><td>LGPL-2.1</td></tr><tr><td><a href="/facts/LibTIFF/VbBDqLTd">LibTIFF</a></td><td>C</td><td>LibTIFF License</td></tr><tr><td><a href="/facts/Libusb/sjQn0yEY">libusb</a></td><td>C</td><td>LGPL-2.1</td></tr><tr><td><a href="/facts/Libuv/DP3dfJVy">libuv</a></td><td>C</td><td>MIT</td></tr><tr><td>Libt2n</td><td>C</td><td>GPL-2.0</td></tr><tr><td><a href="/facts/LibVNCServer/fa2ggB9b">LibVNCServer</a></td><td>C</td><td>GPL-2.0</td></tr><tr><td><a href="/facts/Libvpx/YFQEMMSu">libvpx</a></td><td>C</td><td>BSD-2-Clause</td></tr><tr><td><a href="/facts/Libxml2/jxWA6GX1">libxml2</a></td><td>C</td><td>MIT</td></tr><tr><td><a href="/facts/Libxslt/GwCvwg2p">libxslt</a></td><td>C</td><td>MIT</td></tr><tr><td><a href="/facts/Little_CMS/kBuYx7oF">Little CMS</a></td><td>C</td><td>MIT</td></tr><tr><td><a href="/facts/LZFSE/an7HA61Q">LZFSE</a></td><td>C</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/Mbed_TLS/33AV5voW">Mbed TLS</a></td><td>C</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/Mesa_(computer_graphics)/oxcVI6bd">Mesa</a></td><td>C</td><td>MIT</td></tr><tr><td><a href="/facts/MsQuic/vgGvmlte">MsQuic</a></td><td>C</td><td>MIT</td></tr><tr><td><a href="/facts/MuJoCo/r1YCpIUc">MuJoCo</a></td><td>C</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/MuPDF/0bopKV6J">MuPDF</a></td><td>C</td><td>AGPL-3.0</td></tr><tr><td><a href="/facts/Mustache_(template_system)/m3EAsoqt">Mustache</a></td><td>C</td><td>MIT</td></tr><tr><td><a href="/facts/Ncurses/anPTppfj">ncurses</a></td><td>C</td><td>MIT</td></tr><tr><td><a href="/facts/Netpbm/JnAKxh8B">Netpbm</a></td><td>C</td><td>MIT</td></tr><tr><td><a href="/facts/Nettle_(cryptographic_library)/kCnP3sQF">Nettle</a></td><td>C</td><td>GPL-2.0-or-later</td></tr><tr><td><a href="/facts/Newt_(programming_library)/2Wg3JbCo">Newt</a></td><td>C</td><td>MIT</td></tr><tr><td><a href="/facts/Nghttp2/J9IhrXY3">nghttp2</a></td><td>C</td><td>MIT</td></tr><tr><td><a href="/facts/OpenGL_Utility_Library/BoKmQapx">OpenGL Utility Library</a></td><td>C</td><td>SGI Free Software License B</td></tr><tr><td><a href="/facts/OpenJPEG/Y9PnxAdQ">OpenJPEG</a></td><td>C</td><td>GPL-2.0</td></tr><tr><td><a href="/facts/Oracle_Berkeley_DB/lWwNrclz">Oracle Berkeley DB</a></td><td>C</td><td><a href="/facts/Multi-licensing/4PvsDgfB">Dual-licensed</a> <a href="/facts/GNU_Affero_General_Public_License/n1h9A893">GNU AGPL</a></td></tr><tr><td><a href="/facts/Pango/ywAx4XLq">Pango</a></td><td>C</td><td>LGPL</td></tr><tr><td><a href="/facts/Perl_Compatible_Regular_Expressions/JXYJEsUq">Perl Compatible Regular Expressions</a></td><td>C</td><td>BSD</td></tr><tr><td><a href="/facts/PROJ/gcvPmjpU">PROJ</a></td><td>C</td><td>MIT</td></tr><tr><td><a href="/facts/Pthreads/S8oH6pI9">libpthread</a></td><td>C</td><td>GPL-2.0-or-later</td></tr><tr><td><a href="/facts/Raylib/fbq6I4zk">raylib</a></td><td>C</td><td>zlib</td></tr><tr><td><a href="/facts/Seed_(programming)/Jqu2HHHX">Seed</a></td><td>C</td><td>MIT</td></tr><tr><td><a href="/facts/Simple_DirectMedia_Layer/9tSff0Lg">Simple DirectMedia Layer</a></td><td>C</td><td>Zlib License</td></tr><tr><td><a href="/facts/SVGALib/mSXxl68G">SVGALib</a></td><td>C</td><td>LGPL-2.1</td></tr><tr><td><a href="/facts/Systemd/zls5HoVh">Systemd libraries</a></td><td>C</td><td>LGPL-2.1-or-later</td></tr><tr><td><a href="/facts/Tk_(software)/Y6NBxcbF">Tk</a></td><td>C</td><td>BSD-style</td></tr><tr><td><a href="/facts/UMFPACK/p1RWGvTk">UMFPACK</a></td><td>C</td><td>LGPL-2.1</td></tr><tr><td><a href="/facts/Vorbis/rqJDTF0T">Vorbis</a></td><td>C</td><td>BSD</td></tr><tr><td><a href="/facts/VDPAU/nQ1IYIdW">VDPAU libvdpau</a></td><td>C</td><td>MIT</td></tr><tr><td><a href="/facts/XCB/fpbewG2N">XCB</a></td><td>C</td><td>MIT</td></tr><tr><td><a href="/facts/Xft/IMzFa6wh">Xft</a></td><td>C</td><td>MIT/X</td></tr><tr><td><a href="/facts/Xlib/2fKMo9BF">Xlib</a></td><td>C</td><td>MIT</td></tr><tr><td><a href="/facts/XMLStarlet/f4qo4RD5">XMLStarlet</a></td><td>C</td><td>MIT</td></tr><tr><td><a href="/facts/Zlib/rExIchaK">zlib</a></td><td>C</td><td>Zlib</td></tr><tr><td><a href="/facts/Zopfli/cNPmsRoh">Zopfli</a></td><td>C</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/Allegro_(software_library)/mK4JBTk2">Allegro</a></td><td>C, C++</td><td>zlib</td></tr><tr><td><a href="/facts/ARToolKit/1E9aCQaz">ARToolKit</a></td><td>C, C++</td><td>GPL</td></tr><tr><td><a href="/facts/DevIL/4FBx2qpz">DevIL</a></td><td>C, C++</td><td>LGPL-2.1</td></tr><tr><td><a href="/facts/FFTW/Q7STPyIk">FFTW</a></td><td>C, <a href="/facts/OCaml/ThBGLND8">OCaml</a></td><td>GPL-2.0-or-later</td></tr><tr><td><a href="/facts/GraphicsMagick/a9Av3o8R">GraphicsMagick</a></td><td>C, C++</td><td>ImageMagick License</td></tr><tr><td><a href="/facts/ImageMagick/sIC3ycHo">ImageMagick library</a></td><td>C, C++, Perl, Python, Ruby, Java, PHP</td><td>ImageMagick License</td></tr><tr><td><a href="/facts/International_Components_for_Unicode/SVyD2Yr5">International Components for Unicode</a></td><td>C, C++, Java</td><td>ICU-4.0</td></tr><tr><td><a href="/facts/Libcamera/xtpPJdk5">libcamera</a></td><td>C, C++</td><td>GPL-2.0</td></tr><tr><td><a href="/facts/Math_Kernel_Library/nwPPAUpe">Math Kernel Library</a></td><td>C, C++, <a href="/facts/OneAPI_(compute_acceleration)/Mr5cz938">DPC++</a>, <a href="/facts/Fortran/m1KqjcMU">Fortran</a></td><td>Apache License 2.0</td></tr><tr><td><a href="/facts/Sass_(style_sheet_language)/qsc3Bw3W">libSass</a></td><td>C, C++</td><td>MIT</td></tr><tr><td><a href="/facts/LibSBML/tY2vIpM9">libSBML</a></td><td>C, C++</td><td>LGPL-2.1</td></tr><tr><td><a href="/facts/Libx_(graphics_library)/cdhFggdu">LibX</a></td><td>C, C++, Python</td><td>MIT</td></tr><tr><td><a href="/facts/MoltenVK/T2Ub2lKp">MoltenVK</a></td><td>C, C++</td><td>MIT</td></tr><tr><td><a href="/facts/Netlib/4QQJ2DKk">Netlib</a></td><td>C, <a href="/facts/C%252B%252B/Et0F2qn9">C++</a>, <a href="/facts/Fortran/m1KqjcMU">Fortran</a>, <a href="/facts/MATLAB/qPjLISCk">MATLAB</a></td><td>Public Domain</td></tr><tr><td><a href="/facts/SQLite/1PwYzIft">SQLite</a></td><td>C, <a href="/facts/C%252B%252B/Et0F2qn9">C++</a>, <a href="/facts/Swift_/A7qHQC32">Swift</a>, <a href="/facts/Python_/YbuGqofa">Python</a>, <a href="/facts/Java/2MNA2rLm">Java</a></td><td>Public domain</td></tr><tr><td><a href="/facts/OpenSSL/aXvs5fo2">OpenSSL</a></td><td>C, C++</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/PLplot/ldTExbD1">PLplot</a></td><td>C, C++, Fortran, Java, <a href="/facts/OCaml/ThBGLND8">OCaml</a>, Python, <a href="/facts/Tcl/s7fbKYtR">Tcl</a></td><td>LGPL</td></tr><tr><td><a href="/facts/PowerToys/cfJJW5CK">PowerToys</a></td><td>C, C++</td><td>MIT</td></tr><tr><td><a href="/facts/VDPAU/nQ1IYIdW">VDPAU</a></td><td>C, C++</td><td>MIT</td></tr><tr><td><a href="/facts/Windows_Template_Library/u5V4oKl8">Windows Template Library</a></td><td>C, C++</td><td><a href="/facts/Common_Public_License/M12x3DgF">CPL</a>, <a href="/facts/Microsoft_Public_License/axtrf73j">MPL</a></td></tr><tr><td><a href="/facts/Armadillo_(C%252B%252B_library)/ANyYTA2o">Armadillo</a></td><td><a href="/facts/C%252B%252B/Et0F2qn9">C++</a></td><td>MPL 2.0</td></tr><tr><td><a href="/facts/Asio_(C%252B%252B_library)/MjvNFMYg">Asio</a></td><td>C++</td><td>Boost Software License</td></tr><tr><td><a href="/facts/Bitpit/Td6JEpxg">Bitpit</a></td><td>C++</td><td>LGPL-3.0</td></tr><tr><td><a href="/facts/Boost_(C%252B%252B_libraries)/vGLGG51A">Boost</a></td><td>C++</td><td>Boost Software License</td></tr><tr><td><a href="/facts/Botan_(programming_library)/IehRkvcn">Botan</a></td><td>C++</td><td>MPL-2.0</td></tr><tr><td><a href="/facts/C%252B%252B_Standard_Library/A5vQNSAD">C++ Standard Library</a></td><td>C++</td><td>GPL-3.0-or-later</td></tr><tr><td><a href="/facts/Caffe_(software)/Gnqx7uqp">Caffe</a></td><td>C++</td><td>BSD</td></tr><tr><td><a href="/facts/CAPD_library/26Bmk90P">CAPD</a></td><td>C++</td><td>GPL-3.0</td></tr><tr><td><a href="/facts/CGAL/Dyyl9PGD">CGAL</a></td><td>C++</td><td>GPL-3.0</td></tr><tr><td><a href="/facts/Cinder_(programming_library)/rGNAUpEB">Cinder</a></td><td>C++</td><td>MIT</td></tr><tr><td><a href="/facts/ClanLib/qtpJgkkD">ClanLib library</a></td><td>C++</td><td>zlib</td></tr><tr><td><a href="/facts/Class_Library_for_Numbers/TcpurIHR">Class Library for Numbers</a></td><td>C++</td><td>GPL</td></tr><tr><td><a href="/facts/CppUnit/2mPx276N">CppUnit</a></td><td>C++</td><td>GPL-3.0</td></tr><tr><td><a href="/facts/Crypto%252B%252B/cCWAwUmX">Crypto++</a></td><td>C++</td><td>Boost Software License</td></tr><tr><td><a href="/facts/Deal.II/RBBkBX0S">deal.II</a></td><td>C++</td><td>GPL-3.0</td></tr><tr><td><a href="/facts/Dlib/IAcDlHz1">Dlib</a></td><td>C++</td><td>Boost Software License</td></tr><tr><td>Effi libraries</td><td>C++</td><td>GPL-3.0</td></tr><tr><td><a href="/facts/Eigen_(C%252B%252B_library)/js8e67k3">Eigen</a></td><td>C++</td><td>MPL2</td></tr><tr><td><a href="/facts/FastText/vGNkINgl">fastText</a></td><td>C++</td><td>MIT</td></tr><tr><td><a href="/facts/FLTK/a9R0RuQI">FLTK</a></td><td>C++</td><td>LGPL-2.0-or-later</td></tr><tr><td><a href="/facts/GDAL/oAo5CuIn">Geospatial Data Abstraction Library</a></td><td>C++</td><td>MIT</td></tr><tr><td><a href="/facts/General_Polygon_Clipper/TmwSKsbh">General Polygon Clipper</a></td><td>C++</td><td>zlib</td></tr><tr><td><a href="/facts/GLFW/Kx8N97Pv">GLFW</a></td><td>C++</td><td>Zlib License</td></tr><tr><td><a href="/facts/Google_Test/rr1FMbsc">Google Test</a></td><td>C++</td><td>BSD-3</td></tr><tr><td><a href="/facts/HarfBuzz/jAXt9dG2">HarfBuzz</a></td><td>C++</td><td>MIT</td></tr><tr><td><a href="/facts/Insight_Segmentation_and_Registration_Toolkit/GbKIbFG0">Insight Segmentation and Registration Toolkit</a></td><td>C++</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/ArrayFire/EuQt0yYk">Jackets library</a></td><td>C++, <a href="/facts/MATLAB/qPjLISCk">MATLAB</a></td><td>Apache 2.0</td></tr><tr><td><a href="/facts/FlightGear/Du2xgegG">JSBSim</a></td><td>C++</td><td>GPL-3.0</td></tr><tr><td><a href="/facts/JUCE/lte6rvPS">JUCE</a></td><td>C++</td><td>GPL-3.0</td></tr><tr><td><a href="/facts/KDE_Frameworks/fuAzewMT">KDE Frameworks</a></td><td>C++</td><td>LGPL-2.1+</td></tr><tr><td><a href="/facts/LEMON_(C%252B%252B_library)/ek5VWK4m">LEMON</a></td><td>C++</td><td>LGPL-3.0</td></tr><tr><td><a href="/facts/LevelDB/ffG5drbg">LevelDB</a></td><td>C++</td><td>BSD</td></tr><tr><td><a href="/facts/Libdash/fDVk0Aey">Libdash</a></td><td>C++</td><td>MIT</td></tr><tr><td><a href="/facts/LibLAS/y0QRTp74">libLAS</a></td><td>C++</td><td>LGPL-2.1</td></tr><tr><td><a href="/facts/Libsigc%252B%252B/mkmyFvDR">libsigc++</a></td><td>C++</td><td>LGPL</td></tr><tr><td><a href="/facts/LIVE555/eBXYD7Vf">LIVE555</a></td><td>C++</td><td>GNU GPL</td></tr><tr><td><a href="/facts/Metakit/3vX5uN1Y">Metakit</a></td><td>C++</td><td>MIT</td></tr><tr><td><a href="/facts/Microsoft_SEAL/UcwRDbxE">Microsoft SEAL</a></td><td>C++</td><td>MIT</td></tr><tr><td><a href="/facts/Modern_C%252B%252B_Design/u7EL1aFL">Loki library</a></td><td>C++</td><td>Boost Software License</td></tr><tr><td><a href="/facts/Mlpack/qvVhMxLL">mlpack</a></td><td>C++</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/Mobile_Robot_Programming_Toolkit/gPAaRXsW">Mobile Robot Programming Toolkit</a></td><td>C++</td><td><a href="/facts/BSD-3-Clause/XLtmLp5x">BSD-3-Clause</a></td></tr><tr><td><a href="/facts/Open_Asset_Import_Library/sAyJDn7y">Open Asset Import Library</a></td><td>C++</td><td>LGPL</td></tr><tr><td><a href="/facts/Open_Cascade_Technology/bEbtDvYk">Open Cascade libraries</a></td><td>C++</td><td>LGPL 2.1 only</td></tr><tr><td><a href="/facts/OpenFOAM/juBSzlRz">OpenFOAM</a></td><td>C++</td><td>GPLv3</td></tr><tr><td><a href="/facts/OpenImageIO/g8730Q5j">OpenImageIO</a></td><td>C++</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/OpenNN/h15w3VlK">OpenNN</a></td><td>C++</td><td>GPL</td></tr><tr><td><a href="/facts/OpenVDB/om0aVtEp">OpenVDB</a></td><td>C++</td><td>MPL-2.0</td></tr><tr><td><a href="/facts/OpenFrameworks/deGNfTnz">openFrameworks</a></td><td>C++</td><td>MIT</td></tr><tr><td><a href="/facts/OpenRTM-aist/rmdhhe0y">OpenRTM-aist</a></td><td>C++</td><td>LGPL-2.1</td></tr><tr><td><a href="/facts/Orfeo_toolbox/DDqxa6g6">Orfeo toolbox</a></td><td>C++</td><td>CeCILL-2.1</td></tr><tr><td><a href="/facts/OR-Tools/1HnjsxRd">OR-Tools</a></td><td>C++</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/PhysX/FabGhdvx">PhysX SDK</a></td><td>C++</td><td>BSD-3</td></tr><tr><td><a href="/facts/POCO_C%252B%252B_Libraries/soekN5d9">POCO C++ Libraries</a></td><td>C++</td><td>MIT</td></tr><tr><td><a href="/facts/Poppler_(software)/nhkapMfz">Poppler</a></td><td>C++</td><td>GPL-2.0-or-later</td></tr><tr><td><a href="/facts/Protocol_Buffers/4Pj3zymo">Protocol Buffers</a></td><td>C++</td><td>BSD-3-Clause</td></tr><tr><td><a href="/facts/Qt_(framework)/gVhwlQnJ">Qt</a></td><td>C++</td><td><a href="/facts/GNU_General_Public_License/S75KhLSX">GPL 2.0, 3.0</a> / <a href="/facts/GNU_Lesser_General_Public_License/AXwkz9x3">LGPL 3.0</a></td></tr><tr><td><a href="/facts/QuantLib/WXw31VLQ">QuantLib</a></td><td>C++</td><td>GPL-2.0</td></tr><tr><td><a href="/facts/RocksDB/SveC2lEp">RocksDB</a></td><td>C++</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/ROOT/Hk7ucczM">ROOT</a></td><td>C++</td><td>GNU GPLv3</td></tr><tr><td><a href="/facts/Scintilla_(software)/SGgVAN82">Scintilla</a></td><td>C++</td><td>MIT</td></tr><tr><td><a href="/facts/Simple_and_Fast_Multimedia_Library/RwJfj05B">Simple and Fast Multimedia Library</a></td><td>C++</td><td>Zlib License</td></tr><tr><td><a href="/facts/Skia_Graphics_Engine/Mkm0uXRp">Skia Graphics library</a></td><td>C++</td><td>BSD</td></tr><tr><td><a href="/facts/Snappy_(compression)/LxrH8kIF">Snappy</a></td><td>C++</td><td>BSD</td></tr><tr><td><a href="/facts/Standard_Template_Library/IxqpRzWU">Standard Template Library (STL)</a></td><td>C++</td><td>None (Standard C++)</td></tr><tr><td><a href="/facts/Stapl/jknNvajn">Stapl</a></td><td>C++</td><td>BSD</td></tr><tr><td><a href="/facts/SymbolicC%252B%252B/4UbNSe7Y">SymbolicC++</a></td><td>C++</td><td>GNU GPL</td></tr><tr><td>TBOX</td><td>C++</td><td>MIT</td></tr><tr><td><a href="/facts/TerraLib/qk1kNBAI">TerraLib</a></td><td>C++</td><td>GPL-3.0</td></tr><tr><td><a href="/facts/Tesseract_OCR/dGJ01LJy">Tesseract OCR</a></td><td>C++</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/Threading_Building_Blocks/6DChhaHg">Threading Building Blocks</a></td><td>C++</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/ThreadWeaver/d3Bf6CMJ">ThreadWeaver</a></td><td>C++</td><td>GPL-2.0</td></tr><tr><td><a href="/facts/TinyXML/K4FIvDYA">TinyXML</a></td><td>C++</td><td>Zlib</td></tr><tr><td><a href="/facts/VTD-XML/7ngTBKQr">VTD-XML</a></td><td>C++</td><td>Apache License 2.0</td></tr><tr><td><a href="/facts/WxWidgets/TQvpa4Pl">wxWidgets</a></td><td>C++</td><td>wxWindows Library Licence</td></tr><tr><td><a href="/facts/X265/grbdzKzS">x265</a></td><td>C++</td><td>GPLv2</td></tr><tr><td><a href="/facts/Apache_MXNet/4q3H8FLh">Apache MXNet</a></td><td>C++, Python, <a href="/facts/Julia_/AoB0PJ9C">Julia</a>, <a href="/facts/R_/LSrkr8K8">R</a></td><td>Apache License 2.0</td></tr><tr><td><a href="/facts/ALGLIB/fSduLPd2">ALGLIB</a></td><td>C++, C#, Python, Java, Lua</td><td>LGPL</td></tr><tr><td><a href="/facts/CMU_Sphinx/c9x02dgJ">CMU Sphinx</a></td><td>C++, <a href="/facts/Java_/9ScgFyAL">Java</a></td><td>Apache 2.0</td></tr><tr><td><a href="/facts/Data_Analytics_Library/uA49Vepm">Data Analytics Library</a></td><td>C++, Java, Python</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/FastText/vGNkINgl">fastText</a></td><td>C++, Python</td><td>MIT</td></tr><tr><td><a href="/facts/OpenCV/V1tXAxyz">OpenCV</a></td><td>C++, Python, Java</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/Shogun_(toolbox)/46cERwRK">Shogun (toolbox)</a></td><td>C++, Python, Java</td><td>GPL</td></tr><tr><td><a href="/facts/Microsoft_Cognitive_Toolkit/RxQwBsmU">Microsoft Cognitive Toolkit</a></td><td>C++, Python</td><td>MIT</td></tr><tr><td><a href="/facts/Robot_Operating_System/vWQLMAbT">Robot Operating System library</a></td><td>C++, Python, <a href="/facts/Lisp_/xJHA3CrX">Lisp</a></td><td>Apache-2.0</td></tr><tr><td><a href="/facts/XGBoost/YupgXmfH">XGBoost</a></td><td>C++, Python, R</td><td>Apache License 2.0</td></tr><tr><td><a href="/facts/Apache_SINGA/KTg2fIKY">Apache SINGA</a></td><td><a href="/facts/Python_/YbuGqofa">Python</a>, C++</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/AppJar/w2qEuNuQ">AppJar</a></td><td><a href="/facts/Python_/YbuGqofa">Python</a></td><td>Apache 2.0</td></tr><tr><td><a href="/facts/Astropy/Mt1Qz1N4">Astropy</a></td><td>Python</td><td>BSD-3</td></tr><tr><td><a href="/facts/Beautiful_Soup_(HTML_parser)/uctLqxAN">Beautiful Soup</a></td><td>Python</td><td>MIT for version 4 and later</td></tr><tr><td><a href="/facts/Biopython/G0BjqB51">Biopython</a></td><td>Python</td><td>BSD</td></tr><tr><td><a href="/facts/Chainer/WN7uuwcz">Chainer</a></td><td>Python</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/CatBoost/d35NHN5T">CatBoost</a></td><td>Python</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/CheetahTemplate/j6Fd2SQS">CheetahTemplate</a></td><td>Python</td><td>MIT</td></tr><tr><td><a href="/facts/Construct_(Python_library)/vLk4VfDy">Construct</a></td><td>Python</td><td>MIT</td></tr><tr><td><a href="/facts/Cubes_(OLAP_server)/8nQBfpPw">Cubes</a></td><td>Python</td><td>GPL-3.0</td></tr><tr><td><a href="/facts/CuPy/QPL03FUv">CuPy</a></td><td>Python</td><td>MIT</td></tr><tr><td><a href="/facts/Dask_(software)/PbyLpsID">Dask</a></td><td>Python</td><td>BSD-3</td></tr><tr><td><a href="/facts/DEAP_(software)/xeQXkpbX">DEAP</a></td><td>Python</td><td>MIT</td></tr><tr><td><a href="/facts/DeepSpeed/qRBmYYbw">DeepSpeed</a></td><td>Python</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/Genshi_(templating_language)/8wSDCVsm">Genshi</a></td><td>Python</td><td>BSD-3</td></tr><tr><td><a href="/facts/Gensim/UgF45Tkh">Gensim</a></td><td>Python</td><td>LGPL-2.1</td></tr><tr><td><a href="/facts/Graph-tool/zchHbj7N">Graph-tool</a></td><td>Python</td><td>GPL-3</td></tr><tr><td><a href="/facts/Horovod_(machine_learning)/kBNycM26">Horovod</a></td><td>Python</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/JAX_(software)/MnxmwXqc">JAX</a></td><td>Python</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/Jinja_(template_engine)/npSms5UJ">Jinja</a></td><td>Python</td><td>BSD-3</td></tr><tr><td><a href="/facts/Keras/oEGGkgN0">Keras</a></td><td>Python</td><td>MIT</td></tr><tr><td><a href="/facts/Mako_(template_engine)/A6gVlK0W">Mako</a></td><td>Python</td><td>MIT</td></tr><tr><td><a href="/facts/Manim/EMrw99Kq">Manim</a></td><td>Python</td><td>MIT</td></tr><tr><td><a href="/facts/Matplotlib/JQSu8CBj">Matplotlib</a></td><td>Python</td><td>PSF 2.0</td></tr><tr><td><a href="/facts/Mlpy/paJVlwv9">mlpy</a></td><td>Python</td><td>GPL-3.0</td></tr><tr><td><a href="/facts/MNE-Python/zM1fHyg7">MNE-Python</a></td><td>Python</td><td>BSD-3</td></tr><tr><td><a href="/facts/Natural_Language_Toolkit/H7BAC8EF">Natural Language Toolkit</a></td><td>Python</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/NeuroKit/QWAPS3Y1">NeuroKit</a></td><td>Python</td><td>MIT</td></tr><tr><td><a href="/facts/NetworkX/Vkq5Ljsh">NetworkX</a></td><td>Python</td><td>BSD-3</td></tr><tr><td><a href="/facts/NumPy/T6FnhWWD">NumPy</a></td><td>Python</td><td>BSD-3</td></tr><tr><td><a href="/facts/OceanParcels/tJoQIyUh">OceanParcels</a></td><td>Python</td><td>MIT</td></tr><tr><td><a href="/facts/OpenAI/V7WVK1t4">OpenAI Gym</a></td><td>Python</td><td>MIT</td></tr><tr><td><a href="/facts/Orange_(software)/cWYD2XzI">Orange</a></td><td>Python</td><td>GPL-3.0-or-later</td></tr><tr><td><a href="/facts/Pandas_(software)/VKkTK8RL">Pandas</a></td><td>Python</td><td>BSD-3</td></tr><tr><td><a href="/facts/Plotly/JBJcgC5o">Plotly.py</a></td><td>Python</td><td>MIT License</td></tr><tr><td><a href="/facts/ProbLog/Hm4S7qT1">ProbLog library</a></td><td>Python</td><td>MIT</td></tr><tr><td><a href="/facts/PsychoPy/SU0qzcaa">PsychoPy</a></td><td>Python</td><td>GPL-3.0</td></tr><tr><td><a href="/facts/Pvlib_python/kgM1hzQD">pvlib python</a></td><td>Python</td><td>MIT</td></tr><tr><td><a href="/facts/Pygame/DKtaG9LK">Pygame</a></td><td>Python</td><td>LGPL</td></tr><tr><td><a href="/facts/Pyglet/os0Jzzf7">Pyglet</a></td><td>Python</td><td>MIT</td></tr><tr><td><a href="/facts/PyGTK/6kJhjDoJ">PyGObject</a></td><td>Python</td><td>LGPL-2.1 or later</td></tr><tr><td><a href="/facts/PyMC/A6mHwtjV">PyMC</a></td><td>Python</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/Python_Imaging_Library/5btDu2pj">Python Imaging Library</a></td><td>Python</td><td>Python Imaging Library License</td></tr><tr><td><a href="/facts/Python_Robotics/V89SY4NG">PyroBot library</a></td><td>Python</td><td>MIT</td></tr><tr><td><a href="/facts/PyTorch/4Gv1t13B">PyTorch</a></td><td>Python</td><td>BSD-3</td></tr><tr><td><a href="/facts/PyTorch_Lightning/BXTkFlVc">PyTorch Lightning</a></td><td>Python</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/Qiskit/ND9psKTQ">Qiskit</a></td><td>Python</td><td>Apache License 2.0</td></tr><tr><td><a href="/facts/Query_Abstraction_Layer/daVgswwP">Query Abstraction Layer</a></td><td>Python</td><td>MIT</td></tr><tr><td><a href="/facts/RDFLib/lrqPdzK2">RDFLib</a></td><td>Python</td><td>MIT</td></tr><tr><td><a href="/facts/RDKit/TRKGMR3C">RDKit</a></td><td>Python</td><td>BSD-3</td></tr><tr><td><a href="/facts/Requests_(software)/QoqHhTaJ">Requests</a></td><td>Python</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/RPyC/THheKHEa">RPyC</a></td><td>Python</td><td>GPL-2.0</td></tr><tr><td><a href="/facts/Sage_Manifolds/MqTlRryN">Sage Manifolds</a></td><td>Python</td><td>GPL-3.0</td></tr><tr><td><a href="/facts/Scikit-image/VAW87JJR">scikit-image</a></td><td>Python</td><td>BSD-3</td></tr><tr><td><a href="/facts/Scikit-learn/HqxDHRMJ">scikit-learn</a></td><td>Python</td><td>BSD-3</td></tr><tr><td><a href="/facts/Scikit-multiflow/QLBuveVH">scikit-multiflow</a></td><td>Python</td><td>BSD-3</td></tr><tr><td><a href="/facts/SciPy/bNcMQGc0">SciPy</a></td><td>Python</td><td>BSD-3</td></tr><tr><td><a href="/facts/SimpleITK/w5h3b04Q">SimpleITK</a></td><td>Python</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/SpaCy/qnabPP3o">spaCy</a></td><td>Python</td><td>MIT</td></tr><tr><td><a href="/facts/SQLAlchemy/CFMvc0dj">SQLAlchemy</a></td><td>Python</td><td>MIT</td></tr><tr><td><a href="/facts/SQLObject/W71jpsCV">SQLObject</a></td><td>Python</td><td>MIT</td></tr><tr><td><a href="/facts/Storm_(software)/Durcusj3">Storm</a></td><td>Python</td><td>MIT</td></tr><tr><td><a href="/facts/SymPy/vWSsBCG0">SymPy</a></td><td>Python</td><td>BSD-3</td></tr><tr><td><a href="/facts/TensorFlow/kDwfBeNd">TensorFlow</a></td><td>Python</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/Theano_(software)/Ydap6eEv">Theano</a></td><td>Python</td><td>MIT</td></tr><tr><td><a href="/facts/TomoPy/HULgwvYU">TomoPy</a></td><td>Python</td><td>BSD-3</td></tr><tr><td><a href="/facts/Hugging_Face/h8kkdUus">Transformers Library</a></td><td>Python</td><td>Apache License 2.0</td></tr><tr><td><a href="/facts/VPython/0hYLv9Pf">VPython</a></td><td>Python</td><td>Licenses vary</td></tr><tr><td><a href="/facts/WxPython/sTdK8guC">wxPython</a></td><td>Python</td><td>wxWindows License</td></tr><tr><td><a href="/facts/XDMF/EuNoDgcD">XDMF</a></td><td>Python</td><td>BSD-3</td></tr><tr><td><a href="/facts/Angular_Material/tkAQu3A3">Angular Material</a></td><td><a href="/facts/TypeScript/A6XNmrTd">TypeScript</a></td><td>MIT</td></tr><tr><td><a href="/facts/AngularJS/vwI5s4aJ">AngularJS Material</a></td><td>TypeScript</td><td>MIT</td></tr><tr><td><a href="/facts/D3.js/H5xQ0vcu">D3.js</a></td><td><a href="/facts/JavaScript/XhhIIEsl">JavaScript</a></td><td>BSD-3</td></tr><tr><td><a href="/facts/Babylon.js/skqbUE9C">Babylon.js</a></td><td>JavaScript</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/BioJS/lTu1q9jY">BioJS</a></td><td>JavaScript</td><td>MIT</td></tr><tr><td><a href="/facts/Blockly/V6MGWU8I">Blockly</a></td><td>JavaScript</td><td>Apache License 2.0</td></tr><tr><td><a href="/facts/Bootstrap_(front-end_framework)/3m5HALpd">Bootstrap</a></td><td>JavaScript</td><td>MIT</td></tr><tr><td><a href="/facts/Chart.js/FCmVbmy9">Chart.js</a></td><td>JavaScript</td><td>MIT</td></tr><tr><td><a href="/facts/D3.js/H5xQ0vcu">D3.js</a></td><td>JavaScript</td><td>BSD-3</td></tr><tr><td><a href="/facts/Dojo_Toolkit/mCK8Y7B5">Dojo Toolkit</a></td><td>JavaScript</td><td>BSD-3</td></tr><tr><td><a href="/facts/Express.js/EJKbXAL4">Express.js</a></td><td>JavaScript</td><td>MIT</td></tr><tr><td><a href="/facts/Google_Closure_Tools/qs8FBWkj">Google Closure Library</a></td><td>JavaScript</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/JQuery/YIqFG0ww">jQuery</a></td><td>JavaScript</td><td>MIT</td></tr><tr><td><a href="/facts/Lodash/DS0PXlNh">Lodash</a></td><td>JavaScript</td><td>MIT</td></tr><tr><td><a href="/facts/MathJax/l6REKo2b">MathJax</a></td><td>JavaScript</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/Polymer_(library)/Law69qqD">Polymer</a></td><td>JavaScript, <a href="/facts/HTML/sSc3fT78">HTML</a></td><td>MIT</td></tr><tr><td><a href="/facts/Processing/5ghkrvMe">Processing libraries</a></td><td>JavaScript</td><td>MIT</td></tr><tr><td><a href="/facts/RGraph/ypMKvlad">RGraph</a></td><td>JavaScript</td><td>MIT</td></tr><tr><td><a href="/facts/Rapha%25C3%25ABl_(JavaScript_library)/vkLWaeA2">Raphaël</a></td><td>JavaScript</td><td>MIT</td></tr><tr><td><a href="/facts/React_(JavaScript_library)/wEllNzoY">React</a></td><td>JavaScript</td><td>MIT</td></tr><tr><td><a href="/facts/Three.js/h9p32kv5">Three.js</a></td><td>JavaScript</td><td>MIT</td></tr><tr><td><a href="/facts/Velocity_(JavaScript_library)/l1blcE3u">Velocity</a></td><td>JavaScript</td><td>MIT</td></tr><tr><td><a href="/facts/Vue.js/AojblWPD">Vue.js</a></td><td>JavaScript</td><td>MIT</td></tr><tr><td><a href="/facts/Webix/uEk51ks0">Webix</a></td><td>JavaScript</td><td>GNU-GPL, MIT, BSD, via FLOSS</td></tr><tr><td><a href="/facts/WinJS/76BKAjyd">WinJS</a></td><td>JavaScript, <a href="/facts/TypeScript/A6XNmrTd">TypeScript</a></td><td>MIT</td></tr><tr><td><a href="/facts/RiTa/wIC5HFCK">RiTa</a></td><td>JavaScript, Java</td><td>GPL-3.0</td></tr><tr><td><a href="/facts/Apache_Ant/CT6ABXEx">Apache Ant repository</a></td><td><a href="/facts/Java_/9ScgFyAL">Java</a></td><td>Apache 2.0</td></tr><tr><td><a href="/facts/Apache_Calcite/turStPJL">Apache Calcite</a></td><td>Java</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/Apache_Commons/wTW3nDuz">Apache Commons</a></td><td>Java</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/Apache_CXF/wk5DJ8rP">Apache CXF</a></td><td>Java</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/Apache_Empire-db/0fXTWRCo">Apache Empire-db</a></td><td>Java</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/Apache_Lucene/tPQ0D39Y">Apache Lucene</a></td><td>Java</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/Apache_Maven/xHkdXzqa">Apache Maven</a></td><td>Java</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/Apache_OpenNLP/dDUPnuzz">Apache OpenNLP</a></td><td>Java</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/Apache_PDFBox/ody96ETq">Apache PDFBox</a></td><td>Java</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/Apache_Phoenix/u4ILmg15">Apache Phoenix</a></td><td>Java</td><td>Apache License 2.0</td></tr><tr><td><a href="/facts/Apache_POI/wv7Qvscv">Apache POI</a></td><td>Java</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/Apache_Velocity/Ed0ENs6Q">Apache Velocity</a></td><td>Java</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/Apache_Xalan/z94u6mQb">Apache Xalan</a></td><td>Java</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/Apache_Xerces/BSTPTDee">Apache Xerces</a></td><td>Java</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/Apache_XMLBeans/hwACxMPI">Apache XMLBeans</a></td><td>Java</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/BioJava/337yp2fF">BioJava</a></td><td>Java</td><td>LGPL-2.1</td></tr><tr><td><a href="/facts/Bouncy_Castle_(cryptography)/uwEYp9tT">Bouncy Castle (cryptography)</a></td><td>Java</td><td>MIT</td></tr><tr><td><a href="/facts/Cassowary_(software)/2boA4ltr">Cassowary</a></td><td>Java</td><td>MIT</td></tr><tr><td><a href="/facts/Chemistry_Development_Kit/9hoeQIBp">Chemistry Development Kit</a></td><td>Java</td><td>LGPL 2.0</td></tr><tr><td><a href="/facts/Colt_(libraries)/EDESm0bX">Colt</a></td><td>Java</td><td>EPL-1.0</td></tr><tr><td><a href="/facts/Cytoscape/XucQYzdf">Cytoscape</a></td><td>Java</td><td>LGPL-2.1</td></tr><tr><td><a href="/facts/Deeplearning4j/chxHLqJs">Deeplearning4j</a></td><td>Java</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/Dom4j/uM28RKKm">Dom4j</a></td><td>Java</td><td>GNU Lesser General Public License</td></tr><tr><td><a href="/facts/Exp4j/rV2eGHxd">Exp4j</a></td><td>Java</td><td>Apache License 2.0</td></tr><tr><td><a href="/facts/Flying_Saucer_(library)/3F36yUld">Flying Saucer</a></td><td>Java</td><td>LGPL-2.1</td></tr><tr><td><a href="/facts/GNU_Classpath/rMSHp6ce">GNU Classpath</a></td><td>Java</td><td>GPL-2.0</td></tr><tr><td><a href="/facts/Google_Guava/0yFXNnqx">Google Guava library</a></td><td>Java</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/Google_Guice/EylWYzPT">Google Guice</a></td><td>Java</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/Google_Web_Toolkit/k88Ns10e">Google Web Toolkit</a></td><td>Java</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/Gson/y209c63q">Gson</a></td><td>Java</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/Infinispan/lAxEd3fG">Infinispan</a></td><td>Java</td><td>LGPL-2.1-or-later</td></tr><tr><td><a href="/facts/IText/zMu6wlb2">iText</a></td><td>Java</td><td>AGPL-3.0</td></tr><tr><td><a href="/facts/Jackson_(API)/0AjNsh8C">Jackson</a></td><td>Java</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/Javolution/TczJYgIQ">Javolution</a></td><td>Java</td><td>LGPL-2.1</td></tr><tr><td><a href="/facts/Java_Class_Library/ntRSwVde">Java Class Library</a></td><td>Java</td><td>GPL-2.0</td></tr><tr><td><a href="/facts/JavaFX/hWrAAmny">JavaFX</a></td><td>Java</td><td>GPL-2.0-or-later</td></tr><tr><td><a href="/facts/Java-gnome/HdX9wvNp">Java-gnome</a></td><td>Java</td><td>LGPL-2.1</td></tr><tr><td><a href="/facts/Java_OpenGL/5B4k8Tzy">Java OpenGL</a></td><td>Java, C</td><td>BSD</td></tr><tr><td><a href="/facts/Jblas%3a_Linear_Algebra_for_Java/kkGz7vo6">Jblas: Linear Algebra for Java</a></td><td>Java</td><td>LGPL-3</td></tr><tr><td><a href="/facts/JFace/ykBpvndF">JFace</a></td><td>Java</td><td>EPL-2.0</td></tr><tr><td><a href="/facts/JFugue/uNNWA3uc">JFugue</a></td><td>Java</td><td>Apache-2</td></tr><tr><td><a href="/facts/JMusic/UGdvAEtT">jMusic</a></td><td>Java</td><td>GPL-2</td></tr><tr><td><a href="/facts/Jsoup/4cqaWGLA">jsoup</a></td><td>Java</td><td>MIT</td></tr><tr><td><a href="/facts/JUnit/zlddF9S2">JUnit</a></td><td>Java</td><td>EPL 2.0</td></tr><tr><td><a href="/facts/LibGDX/FRSHNUqt">LibGDX</a></td><td>Java</td><td>Apache License 2.0</td></tr><tr><td><a href="/facts/Log4j/fo0Eunj8">Log4j</a></td><td>Java</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/LWJGL/43yxT8cL">LWJGL</a></td><td>Java</td><td>BSD</td></tr><tr><td><a href="/facts/Mallet_(software_project)/Xc1tXNsp">Mallet</a></td><td>Java</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/MOEA_Framework/zfckrwnh">MOEA Framework</a></td><td>Java</td><td>GPL-3.0</td></tr><tr><td><a href="/facts/Netty_(software)/omxVyJh2">Netty</a></td><td>Java</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/Neuroph/7FnRcQpm">Neuroph</a></td><td>Java</td><td>Apache License 2.0</td></tr><tr><td><a href="/facts/ObjectWeb_ASM/9BDbkYlH">ObjectWeb ASM</a></td><td>Java</td><td>LGPL-3.0</td></tr><tr><td><a href="/facts/OjAlgo/ytRqsY5f">OjAlgo</a></td><td>Java</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/OpenPDF/GVbhBABQ">OpenPDF</a></td><td>Java</td><td>GPL-2.0</td></tr><tr><td><a href="/facts/Open_Source_Physics/vq4QMhJK">Open Source Physics</a></td><td>Java</td><td>GPL-2.0</td></tr><tr><td><a href="/facts/OpenWire_(library)/6SMzwgUE">OpenWire</a></td><td>Java</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/Parallel_Colt/XkEXvF85">Parallel Colt</a></td><td>Java</td><td>GPL-3.0</td></tr><tr><td><a href="/facts/Parboiled_(Java)/b4IHUoFN">Parboiled</a></td><td>Java</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/Processing/5ghkrvMe">Processing</a></td><td>Java</td><td>GPL-2.0</td></tr><tr><td><a href="/facts/Quartz_(scheduler)/KUXVDxs9">Quartz</a></td><td>Java</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/SLF4J/xNm02VYs">SLF4J</a></td><td>Java</td><td>MIT</td></tr><tr><td><a href="/facts/Spring_Batch/9qoP6whP">Spring Batch</a></td><td>Java</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/Spring_Framework/ajIwLM73">Spring Framework</a></td><td>Java</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/StAX/5rTCs58B">StAX</a></td><td>Java</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/Standard_Widget_Toolkit/GTFSXyBV">Standard Widget Toolkit</a></td><td>Java</td><td>EPL-2.0</td></tr><tr><td><a href="/facts/Swing_(Java)/xFbyDcjS">Swing</a></td><td>Java</td><td>GPL-2.0-or-later</td></tr><tr><td><a href="/facts/Thymeleaf/yuuyLXSz">Thymeleaf</a></td><td>Java</td><td>Apache 2.0</td></tr><tr><td>Verax IPMI</td><td>Java</td><td>GPL-3.0</td></tr><tr><td><a href="/facts/XStream/1FphgLx9">XStream</a></td><td>Java</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/BioRuby/rFBQ8jf9">BioRuby</a></td><td><a href="/facts/Ruby_/BeYSaPSR">Ruby</a></td><td>GPL-2.0</td></tr><tr><td>Eulim</td><td>Ruby</td><td>MIT</td></tr><tr><td><a href="/facts/ERuby/SfQFc10o">eRuby</a></td><td>Ruby</td><td>MIT</td></tr><tr><td><a href="/facts/Haml/XAnWWMUf">Haml</a></td><td>Ruby</td><td>MIT</td></tr><tr><td><a href="/facts/Nokogiri_(software)/3AXoGh1Q">Nokogiri</a></td><td>Ruby</td><td>MIT</td></tr><tr><td><a href="/facts/RSpec/w9svIVRS">RSpec</a></td><td>Ruby</td><td>MIT</td></tr><tr><td><a href="/facts/RubyGems/GWoWccho">RubyGems</a></td><td>Ruby</td><td><a href="/facts/Ruby_License/1wLWPzKe">Ruby License</a></td></tr><tr><td><a href="/facts/Ruby_on_Rails/aG5P6uon">Ruby on Rails</a></td><td>Ruby</td><td>MIT</td></tr><tr><td><a href="/facts/Sinatra_(software)/NSe8r5rN">Sinatra</a></td><td>Ruby</td><td>MIT</td></tr><tr><td><a href="/facts/ADOdb/UmwD0hsF">ADOdb</a></td><td><a href="/facts/PHP/02Lfe6RM">PHP</a></td><td>LGPL</td></tr><tr><td><a href="/facts/AmfPHP/6mBFuG6s">AmfPHP</a></td><td>PHP</td><td>GPL</td></tr><tr><td><a href="/facts/Composer_(software)/VGETv2Hs">Composer</a></td><td>PHP</td><td>MIT</td></tr><tr><td><a href="/facts/Doctrine_(PHP)/RGMGWXhn">Doctrine</a></td><td>PHP</td><td>MIT</td></tr><tr><td><a href="/facts/Guzzle_(PHP_library)/sMQKClcn">Guzzle</a></td><td>PHP</td><td>MIT</td></tr><tr><td><a href="/facts/Laravel/nc3vYq0J">Laravel</a></td><td>PHP</td><td>MIT</td></tr><tr><td><a href="/facts/Laminas/J4xsYpzy">Laminas</a></td><td>PHP</td><td>MIT</td></tr><tr><td><a href="/facts/Li3_(software)/cHyCrK4c">li3</a></td><td>PHP</td><td>MIT</td></tr><tr><td><a href="/facts/PHPMailer/xqksI5oG">PHPMailer</a></td><td>PHP</td><td>LGPL</td></tr><tr><td><a href="/facts/RedBeanPHP/A8nDX9Dd">RedBeanPHP</a></td><td>PHP</td><td>BSD</td></tr><tr><td><a href="/facts/Simple_Cloud_API/A0YrhPII">Simple Cloud API</a></td><td>PHP</td><td>Apache 2.0</td></tr><tr><td><a href="/facts/SimpleXML/UbL7lzPa">SimpleXML</a></td><td>PHP</td><td>PHP</td></tr><tr><td><a href="/facts/Symfony/xkYa3sh1">Symfony</a></td><td>PHP</td><td>MIT</td></tr><tr><td><a href="/facts/Twig_(template_engine)/pK7J67bJ">Twig</a></td><td>PHP</td><td>BSD</td></tr><tr><td><a href="/facts/XHP/VEoMxMpV">XHP</a></td><td>PHP, <a href="/facts/Hack_/yIpr4zfv">Hack</a></td><td>MIT</td></tr><tr><td><a href="/facts/Rocket_(web_framework)/1oacT5CY">Rocket</a></td><td><a href="/facts/Rust_/8JNMV19F">Rust</a></td><td>MIT</td></tr><tr><td><a href="/facts/Rustls/q8PXhYxu">Rustls</a></td><td>Rust</td><td>Apache License 2.0</td></tr><tr><td><a href="/facts/Tokio_(software)/kCGcMhnU">Tokio</a></td><td>Rust</td><td>MIT</td></tr><tr><td><a href="/facts/Standard_ML_of_New_Jersey/5WUYMHsD">Standard ML Basis Library</a></td><td><a href="/facts/Standard_ML/4LaEq9tA">Standard ML</a></td><td>MIT</td></tr><tr><td><a href="/facts/FCL-Web/BwN2elgs">FCL-Web</a></td><td><a href="/facts/Pascal_/b3yvp8bF">Pascal</a></td><td>GPL-2.0</td></tr><tr><td><a href="/facts/FpGUI/8Yn8HFP4">fpGUI</a></td><td>Pascal</td><td>GPL-2.0</td></tr><tr><td><a href="/facts/Turbo_Vision/bTGhaFWw">Turbo Vision</a></td><td>Pascal, C++</td><td>MPL-1.1</td></tr><tr><td><a href="/facts/Widgetset/daVw6Dr5">Widgetset</a></td><td>Pascal</td><td>GPL-2.0</td></tr><tr><td><a href="/facts/Free_Component_Library/kJ4pjj5m">Free Component Library</a></td><td><a href="/facts/Object_Pascal/cuGkuISv">Object Pascal</a></td><td>GPL</td></tr><tr><td><a href="/facts/FireMonkey/reS4fePM">FireMonkey</a></td><td><a href="/facts/Delphi_(software)/mAqCJnqm">Delphi</a>, C++</td><td>not available</td></tr><tr><td><a href="/facts/Free_Pascal_Runtime_Library/RluL4Cpr">Free Pascal Runtime Library</a></td><td><a href="/facts/Object_Pascal/cuGkuISv">Object Pascal</a>, <a href="/facts/Delphi_(software)/mAqCJnqm">Delphi</a></td><td>GPL</td></tr><tr><td><a href="/facts/Lazarus_Component_Library/LhrHNzxy">Lazarus Component Library</a></td><td><a href="/facts/Object_Pascal/cuGkuISv">Object Pascal</a></td><td><a href="/facts/GNU_General_Public_License/S75KhLSX">GNU GPL</a>, GPLv2, <a href="/facts/LGPL/AXwkz9x3">LGPL</a>, <a href="/facts/Mozilla_Public_License/hBuvAz1w">MPL</a>.</td></tr><tr><td><a href="/facts/GNU_lightning/SUwDEgYr">GNU lightning</a></td><td><a href="/facts/Assembly_language/7XuV0cla">Assembly language</a>, <a href="/facts/C_/Ky2No763">C</a></td><td>GPL-3.0</td></tr><tr><td><a href="/facts/Libffi/9oFRnwFn">Libffi</a></td><td>Assembly language, C</td><td>MIT</td></tr><tr><td><a href="/facts/Basic_Linear_Algebra_Subprograms/T8Jq1Jpq">Basic Linear Algebra Subprograms</a> (BLAS)</td><td><a href="/facts/Fortran_/m1KqjcMU">Fortran</a>, C, R</td><td>BSD, GPL, LGPL</td></tr><tr><td><a href="/facts/LAPACK/sMGe0RhF">LAPACK</a></td><td>Fortran, <a href="/facts/C_/Ky2No763">C</a></td><td>BSD</td></tr><tr><td><a href="/facts/Dart_/xJ8tE6Tl">Dart core libraries</a></td><td><a href="/facts/Dart_/xJ8tE6Tl">Dart</a></td><td>BSD-3-Clause</td></tr><tr><td><a href="/facts/Gorm_(computing)/TRRRpT3o">GORM</a></td><td><a href="/facts/Go_/oWlsmAFJ">Go</a></td><td>MIT</td></tr><tr><td><a href="/facts/Haskell_Platform/6wG1mJVS">Haskell Platform</a></td><td><a href="/facts/Haskell/ydEsHuGy">Haskell</a></td><td>BSD</td></tr><tr><td><a href="/facts/HaXml/ENpVyvj3">HaXml</a></td><td>Haskell</td><td>BSD-3-Clause</td></tr><tr><td><a href="/facts/Parsec_(parser)/sDckhoVv">Parsec (parser)</a></td><td>Haskell</td><td>MIT</td></tr><tr><td><a href="/facts/QuickCheck/PSTnm0fh">QuickCheck</a></td><td>Haskell</td><td>BSD-3-Clause</td></tr><tr><td><a href="/facts/WxHaskell/VAlve8Lx">wxHaskell</a></td><td>Haskell</td><td>BSD-3-Clause</td></tr><tr><td><a href="/facts/Haxe/jp87sM7P">Haxe library</a></td><td><a href="/facts/Haxe/jp87sM7P">Haxe</a></td><td>MIT License</td></tr><tr><td><a href="/facts/INTLAB/cI4TAqYV">INTLAB</a></td><td><a href="/facts/MATLAB/qPjLISCk">MATLAB</a>, <a href="/facts/GNU_Octave/vVVq5evM">GNU Octave</a></td><td>GPL-3.0</td></tr><tr><td><a href="/facts/Torch_(machine_learning)/2HyQQ2Mr">Torch</a></td><td><a href="/facts/Lua_/xkBCgta0">Lua</a></td><td>MIT</td></tr><tr><td><a href="/facts/Flux_(machine-learning_framework)/k5zTnDKh">Flux</a></td><td><a href="/facts/Julia_/AoB0PJ9C">Julia</a></td><td>MIT</td></tr><tr><td><a href="/facts/Owl_Scientific_Computing/v8tTDzbs">Owl Scientific Computing</a></td><td><a href="/facts/OCaml/ThBGLND8">OCaml</a>, C</td><td>Apache-2.0</td></tr><tr><td><a href="/facts/BioPerl/WXlJn3W1">BioPerl</a></td><td><a href="/facts/Perl/fx31kjlT">Perl</a></td><td>GPL-1.0</td></tr><tr><td><a href="/facts/CPAN/MB7Iv662">CPAN</a></td><td>Perl</td><td><a href="/facts/Artistic_License/9vHBm47P">Artistic</a>-1.0</td></tr><tr><td><a href="/facts/CGI.pm/S16wtvwH">CGI.pm</a></td><td>Perl</td><td>Artistic License 2.0 or GPL</td></tr><tr><td><a href="/facts/DBIx%3a%3aClass/b4uzwJSg">DBIx::Class</a></td><td>Perl</td><td>MIT</td></tr><tr><td><a href="/facts/Gtk2-Perl/KDJzqq2W">Gtk2-Perl</a></td><td>Perl</td><td>LGPL</td></tr><tr><td><a href="/facts/Mojolicious/lqkLGdCS">Mojolicious</a></td><td>Perl</td><td>MIT</td></tr><tr><td><a href="/facts/Moose_(Perl)/Um2JSQc9">Moose</a></td><td>Perl</td><td>MIT</td></tr><tr><td><a href="/facts/Perl_Data_Language/wzAaHo98">Perl Data Language</a></td><td>Perl</td><td>GPL-3.0</td></tr><tr><td><a href="/facts/Perl_DBI/U3fAzmXB">Perl DBI</a></td><td>Perl</td><td>Artistic License 1.0 or GPL</td></tr><tr><td><a href="/facts/Perl_Object_Environment/Uj2qmxmW">Perl Object Environment</a></td><td>Perl</td><td>GPL-2.0</td></tr><tr><td><a href="/facts/Template_Toolkit/ckoqzwuM">Template Toolkit</a></td><td>Perl</td><td>GPL-1.0 or Artistic License 2.0</td></tr><tr><td><a href="/facts/DESeq2/TIWpwc3d">DESeq2</a></td><td><a href="/facts/R_/LSrkr8K8">R</a></td><td>BSD-3</td></tr><tr><td><a href="/facts/Igraph/lj11hE89">igraph</a></td><td>R, Python, C, Ruby, <a href="/facts/MATLAB/qPjLISCk">MATLAB</a></td><td>GPL-2.0</td></tr><tr><td><a href="/facts/LIBSVM/q3wyt771">LIBSVM</a></td><td>R</td><td>LGPL-3.0</td></tr><tr><td><a href="/facts/R_package/etUNSDLc">R package</a></td><td>R</td><td>GPL-2.0</td></tr><tr><td><a href="/facts/Rnn_(software)/xpMdNmIn">rnn</a></td><td>R</td><td>MIT</td></tr><tr><td><a href="/facts/Common_Lisp_Interface_Manager/kpj4eF6h">Common Lisp Interface Manager</a></td><td><a href="/facts/Common_Lisp/mq1pRbSF">Common Lisp</a></td><td>LGPL</td></tr><tr><td><a href="/facts/Common_Lisp/mq1pRbSF">Common Lisp library</a></td><td>Common Lisp</td><td>LGPL-2.1 and others</td></tr><tr><td><a href="/facts/Chicken_(Scheme_implementation)/jqPQRe4q">Chicken eggs</a></td><td><a href="/facts/Chicken_(Scheme_implementation)/jqPQRe4q">Chicken</a> <a href="/facts/Scheme_/0aGdf3SC">Scheme</a></td><td>BSD</td></tr><tr><td><a href="/facts/Perfect_(server_framework)/dp2NSjtr">Perfect</a></td><td><a href="/facts/Swift_/A7qHQC32">Swift</a></td><td>Apache-2.0</td></tr><tr><td><a href="/facts/Vapor_(web_framework)/TNXnsDEK">Vapor</a></td><td>Swift</td><td>MIT</td></tr></tbody></table>