Sites and apps similar to WikiIndex include Wikipedia, which is free and open source. Other options are Kiwix, Grokipedia, Encyclopædia Britannica and WikiSpooks.com. You're spoiled for choice with Encyclopedias like WikiIndex: we list more than 25 alternatives for Android, Linux, Windows, iPad and Mac.
Free content, multilingual online encyclopedia written and maintained by a community of volunteers through a model of open collaboration, using a wiki-based editing system.
United States
Provides offline access to Wikipedia and HTML content via ZIM format, featuring a full-text search engine, multi-language interface, export capabilities, bookmarks, content manager, and support for Windows, macOS, Linux, Android, USB drives, and local servers.
Switzerland
Grokipedia is an online encyclopedia created by xAI that positions itself as an alternative to Wikipedia. Articles are generated and later labeled as “fact checked by .
United States
The Encyclopædia Britannica is a general English-language encyclopaedia published by Encyclopædia Britannica, Inc., a privately-held company. The articles in the Britannica are aimed at educated adult readers, and written by a staff of about 100 full-time editors and...
United States
WikiSpooks is a global alternative encyclopedia on politics, spy craft, deep state intelligence, and conspiracies, free of corporate influence, partisan politics, or government propaganda for historians and truth-seekers to read, edit, and share.
Metapedia is an electronic encyclopedia which focuses on culture, art, science, philosophy and politics.
Scholarpedia is a peer-reviewed open-access encyclopedia written and maintained by scholarly experts from around the world. Scholarpedia is inspired by Wikipedia and aims to complement it by providing in-depth scholarly treatments of academic topics.
XOWA is the free, open-source application that lets you download Wikipedia to your computer. Access all of Wikipedia offline -- without an internet connection!
Oppia is a free, open-source learning platform. Full of interactive activities called 'explorations', Oppia helps curious minds learn and teach.
United States
Non-profit history encyclopedia with the mission to engage people with cultural heritage and to improve history education worldwide.
Australia
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.
LibreGameWiki the free gaming encyclopedia for games developed as open source and using open media.
