HandWiki is described as 'wiki encyclopedia dedicated to scientific computing and science. This wiki can be used for collaborative editing of articles about applications of computers and software programs in different areas of science, finance and engineering' and is an website in the Education & Reference category. There are more than 10 alternatives to HandWiki, not only websites but also apps for a variety of platforms, including Android, iPhone, Android Tablet and iPad. The best alternative is Wikipedia, which is both free and Open Source. Other great sites and apps similar to HandWiki are Khan Academy (Free), Wikiversity (Free, Open Source), Encyclopædia Britannica (Freemium) and Brilliant.org (Freemium).
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.
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.
Scholarpedia is a 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.
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.