1290 Like

Wikipedia

Wikipedia is a free, multilingual encyclopedia project supported by the non-profit Wikimedia Foundation. Wikipedia has 17 million articles (3.5 million in English), which have been written collaboratively by volunteers around the world.

Free Open Source Android iPhone Android Tablet Web Kindle Fire Blackberry MediaWiki

52 Like

Fandom

Fandom is a community-based service that allows anyone to create a wiki on virtually any subject. Discover, share and add your knowledge! Wikia is financed by advertisment!

Free Web

47 Like

Everipedia

Everipedia removed some of the more annoying aspects of Wikipedia and created a site that is much easier to use. Notability requirements are eliminated and citations / editing are WYSIWYG.

Free Mac OS X Windows Linux Android iPhone iPad

11 Like

Referata

Referata offers hosting of semantic wikis, allowing you to add, structure and store data so it can be managed, shared, browsed and analyzed in as many ways as you choose. Free: unlimited Wiki pages and 100MB file storage.

Freemium Web Self-Hosted

11 Like

Infogalactic

Infogalactic is an Internet-based, free-content encyclopedia project that is a dynamic fork of Wikipedia and improves upon the online encyclopedia's model of openly...

Free Web

6 Like

Miraheze

Miraheze is a wiki farm (hosts wikis) for free and with no ads, it also provides custom domains, extensions and many other features.

Free Open Source Web

6 Like

Wikidot

Online collaborative wiki hosting for organizations,etc. Now it's easier than ever to build a website. Publish content, share your documents, collaborate with friends or coworkers, create a place for your community!

Freemium Web

4 Like

Newslines

Newslines lets people create shared timelines on any person, product or news event. Writers create news snippets that are combined into interactive multimedia timelines.

Free Web

3 Like

ListPod.net

Free Web

3 Like

Oppia

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

Free Open Source Mac OS X Windows Linux Web Self-Hosted

3 Like

PCGamingWiki

PCGamingWiki aims to list fixes and workarounds for every single PC game

Free Web

3 Like

Stubia

Stubia is a mobile encyclopedia that limits each article to 160 characters: this limitation makes each topic easy to understand.

Free Web

3 Like

Alchetron

Alchetron.com is a free social encyclopedia for world where you can create, organize and learn easily using topics.

Free Mac OS X Windows Linux Android Android Tablet Chrome OS Web

3 Like

UserPress

Wiki knowledge management for WordPress. 100% open source GPL. Use any theme. No modifications required.

Commercial Self-Hosted Wordpress

3 Like

Scholarpedia

Scholarpedia is a peer-reviewed open-access encyclopedia written and maintained by scholarly experts from around the world.

Free Open Source Web

2 Like

Gamepedia

Gamepedia is a game cataloging application for everyone running Mac OS X. It lets you keep track of your game progress, where your games are and which ones you want to...

Commercial Mac OS X

2 Like

Gamepedia.com

Gamepedia.com is the authoritative source for video game information on the internet. In addition to hosting the official wikis for over 200 titles such as Minecraft and...

Free Mac OS X Windows Linux Android Web

1 Like

Citizendium

A wiki-based encyclopedia, the primary difference between Citizendium and Wikipedia being that Citizendium has "subject matter expert" editors, chosen by the...

Free Web

0 Like

Freebo

Freebo is Topics search tool. If you don't know something, ask Freebo, it probably knows. Pick your interest and have fun reading and learning various Topics data, ...

Free Android Android Tablet