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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!

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 over 4,000 expert contributors. It is widely regarded as the most scholarly of encyclopaedias. Software versions include Britannica Ultimate Reference CD or DVD, Britannica Deluxe CD or DVD and Britannica Online.

Reference.com offers a massive online dictionary, thesaurus, encyclopedia, quote finder, and translator (powered by Google Translate)- all for free. For the Dictionary.com and Thesaurus.com mobile app, go here. Dictionary.com

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 editable content. Infogalactic's pages are interlinked in order to connect the user to related pages with additional information, and are categorized in a variety of ways, including Relativity, Notability, and Reliability to allow the user to prioritize his personalized perspective

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. 5 Languages: English, Deutsch, Español, Português do Brasil, Russian. It can also be used to host ordinary wikis. It runs a slightly modified version of the MediaWiki software, with several extensions installed.

Dixio is the solution for all those who care about their languageWho want to learn more and enrich their vocabulary: when you receive a presentation or prepare a document, when you are reading in Internet or preparing your curriculum, writing an e-mail or expanding your knowledge in the Web.

Metacademy - a free open source platform for efficient, personalized learning.

Miraheze is a free wiki farm, you can request your wiki which is 100% free and has no ads. The code of Miraheze is opensource (Github.com/Miraheze). You can change your logo, request extensions you need, and many other features. Help is provided via email, IRC, Phabricator.

Wikipedia, better than ever—on iPhone, iPad, and Apple Watch. Discover the world and enjoy beautiful typography with this sleek app.

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 Titanfall, we also maintain wikis for smaller titles and independent productions. Anyone can make changes to any Gamepedia wiki, with a flexible staff of wiki managers to screen and approve pending content.

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

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

We find similar sentences to those in Wikipedia, complete with their citations for you to paste into your essay. It's the easy way to branch off to find authoritative sources and relevant quotes to deepen your research.

Encyclopedia.com – Online dictionary and encyclopedia with pictures, facts, and videos. Get information and homework help with millions of articles in our FREE, online library.