Wikimedia Foundation, Projects and Initiatives

Logos of 16 Wikimedia sister projects

For the complete list, see

Content on most Wikimedia project websites is licensed for redistribution under v4.0 of the Attribution and Share-alike Creative Commons licenses.

The Foundation owns and operates 11 wikis that are written, curated, designed, and governed by their communities of volunteer editors.

Any member of the public is welcome to contribute; registering a named user account is optional.

These wikis follow a free content model, with the stated goal of disseminating knowledge to the world.

They include, by launch date:

Wikipedia – online encyclopedia
Wiktionary – online dictionary and thesaurus
Wikibooks – a collection of books, mostly textbooks
Wikiquote – a collection of quotations
Wikivoyage – travel guide
Wikisource – digital library
Wikimedia Commons – repository of images, sounds, videos, and general media
Wikispecies – taxonomic catalog of species
Wikinews – online newspaper
Wikiversity – a collection of tutorials and courses, also a hosting point to coordinate research
Wikidata – knowledge base
Wikifunctions – a catalog of computer functions

Certain additional projects provide infrastructure or coordination of the free knowledge projects. These include:

Meta-Wiki – central site for coordinating all projects and the Wikimedia community
Wikimedia Incubator – a single wiki for drafting the core pages of new language editions in development
MediaWiki – site for coordinating work on MediaWiki software
Wikitech – including Wikimedia Cloud Services, Data Services, Toolforge, and other technical projects and infrastructure
Phabricator – not a wiki, but a global ticketing system for tracking issues and feature requests