Oppia is a free, open-source learning platform. Full of interactive activities called 'explorations', Oppia helps curious minds learn and teach.

Wikiless is described as 'Free open source alternative Wikipedia front-end focused on privacy' and is a Encyclopedia in the education & reference category. There are more than 50 alternatives to Wikiless for a variety of platforms, including Web-based, Android, iPad, iPhone and Linux apps. The best Wikiless alternative is Wikipedia, which is both free and Open Source. Other great apps like Wikiless are Kiwix, Grokipedia, WikiReader and Encyclopædia Britannica.
Oppia is a free, open-source learning platform. Full of interactive activities called 'explorations', Oppia helps curious minds learn and teach.

Non-profit history encyclopedia with the mission to engage people with cultural heritage and to improve history education worldwide.



HandWiki is a wiki encyclopedia dedicated to scientific computing and science. This wiki can be used for collaborative editing of articles about applications of computers and software programs in different areas of science, finance and engineering.

IFWiki is a wiki containing information about interactive fiction, including IF history, theory, craft, tools, and people. IFWiki serves as both a historical record of community knowledge and a guide to resources for playing and creating interactive fiction.


Community-driven catalog of learning resources. Links to resources are organized by topics and rated/reviewed by users so you see which ones are the best. It's free and open for everyone.




LibreGameWiki the free gaming encyclopedia for games developed as open source and using open media.




Online dictionary and encyclopedia with pictures, facts, and videos. Get information and homework help with millions of articles in our free, online library.
WikiPathways was established to facilitate the contribution and maintenance of pathway information by the biology community. WikiPathways is an open, collaborative platform dedicated to the curation of biological pathways.

User-editable encyclopedia for fans of anthropomorphic animals. Over 18,000 articles on furry community and culture in twenty-one languages.
Worldometers is run by an international team of developers, researchers, and volunteers with the goal of making world statistics available in a thought-provoking and time relevant format to a wide audience around the world.