"AnkiDroid: a Flash Based Study Aid". F-Droid. https://f-droid.org/repository/browse/?fdid=com.ichi2.anki
"Oracle Berkeley DB Licensing Information". Oracle. http://www.oracle.com/technetwork/database/berkeleydb/downloads/licensing-098979.html
"Element Copyright License - AGPL 3.0". Github. Retrieved 20 January 2025.{{cite web}}: CS1 maint: url-status (link) https://github.com/element-hq/element-web/blob/develop/LICENSE-AGPL-3.0
"Server Side Public License (SSPL)". Mongo DB, Inc. 16 Oct 2018. Retrieved 10 Jan 2019. https://www.mongodb.com/licensing/server-side-public-license
"Server License". Scylla DB. 19 Nov 2007. Retrieved Mar 4, 2017. http://www.scylladb.com/opensource/server-license
Wiki.js | License, 2018-02-19, retrieved 2018-02-19 https://github.com/Requarks/wiki/blob/master/LICENSE