Scholarpedia is described as 'peer-reviewed open-access encyclopedia written and maintained by scholarly experts from around the world. Scholarpedia is inspired by Wikipedia and aims to complement it by providing in-depth scholarly treatments of academic topics' and is an website in the Education & Reference category. There are more than 10 alternatives to Scholarpedia, not only websites but also apps for a variety of platforms, including Android, iPhone, Mac and Windows. The best alternative is Wikipedia, which is both free and Open Source. Other great sites and apps similar to Scholarpedia are Wikiversity (Free, Open Source), Miraheze (Free, Open Source), Encyclopædia Britannica (Freemium) and WikiSpooks.com (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.
Wikiversity is a Wikimedia Foundation project devoted to learning resources, learning projects, and research for use in all levels, types, and styles of education from pre-school to university, including professional training and informal 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.
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.