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)...

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

1335 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...

Free Web

54 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 /...

Free Mac Windows Linux Android iPhone ... iPad

49 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...

• Warning The articles are not accurate, out of date and politically spun.

Free Web

17 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

9 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...

Freemium Web Self-Hosted

11 Like

PCGamingWiki

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

Free Web

4 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 Windows Linux Web Self-Hosted

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

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...

Freemium Web

6 Like

UserPress

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

• Discontinued The plugin seems to be no longer updated. Last version, 2.0.6, released in July 2015, can be still downloaded from CodeCanyon.net

Commercial Self-Hosted Wordpress

3 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 Windows Linux Web Android ... iPhone Chrome OS Android Tablet iPad

2 Like

Alchetron

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

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

3 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

4 Like

Scholarpedia

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

Free Open Source Web

3 Like