Wikipedia!

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

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. There is also a commenting page for each link or file added.

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.

Like you, we're huge Wikipedia fans! In fact, who isn't? Wikipedia is the greatest curator of human knowledge, allowing people all around the world to freely access over 30 million articles.The only problem? Wikipedia was built 13 years ago - and hasn't changed much since then.

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

Expert-reviewed information about the Earth. For everyone

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

The web's source of information for Ancient History: definitions, articles, timelines, maps, books, and illustrations. We're a small non-profit organisation dedicated to giving highest-quality history content to the world’s history enthusiasts, teachers, and students for free. Ancient History Encyclopedia is the global leader in ancient history content online, boasting the highest number of monthly visitors of any dedicated website.

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.

Explore wikipedia in 3d

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.

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.

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

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