Articles is described as 'lets you easily read and discover Wikipedia Articles on your iPhone and iPod touch' and is an app in the Education & Reference category. There are more than 10 alternatives to Articles for a variety of platforms, including Online / Web-based, iPhone, iPad, Android Tablet and Android. The best alternative is Wikipedia, which is both free and Open Source. Other great apps like Articles are WikiSpooks.com (Free, Open Source), Oppia (Free, Open Source), WikiIndex (Free, Open Source) and Citizendium (Free, Open Source).
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.
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.
Welcome to WikiIndex, a wiki of all wiki, wiki people, wiki software, wiki farms, and wiki ideas, a 'work in progress' founded in 2006. This is part of a continued effort to self-organize information collaboratively, started by Ward Cunningham a decade ago.
Citizendium, powered by MediaWiki, is "an open wiki project dedicated to creating a free, comprehensive, and reliable repository of structured knowledge". Unlike with Wikipedia, a contributor must register using their real name and verify their identity.