OpenVanilla (OV) is an open-source text-entry (input method) and processing architecture designed to enhance the text-entry experience across different operating systems. Initially developed to address the need for alternative input methods on Apple systems and cater to Windows users transitioning to macOS, OV has since expanded its compatibility to include Microsoft Windows and Linux/FreeBSD environments through SCIM integration.
OV provides a collection of input methods and text processing filters, acting as a bridge between input methods and the operating system. It supports Mac OS X versions from 10.3 (Panther) to 10.4 (Tiger), as well as an experimental Win32 Unicode version for Windows users. Its design philosophy emphasizes simplicity and ease of customization, enabling users to develop their own input methods with minimal programming expertise in C++.