Wikipedia - Wikipedia is a free online encyclopedia, created and edited by volunteers around the world and hosted by the Wikimedia Foundation.
Encyclopædia Britannica - Explore the fact-checked online encyclopedia from Encyclopaedia Britannica with hundreds of thousands of objective articles, biographies, videos, and images from experts.
Kiwix - Kiwix enables you to have the whole Wikipedia at hand wherever you go!
WikiSpooks.com - 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.
WikiGenes - The world's first wiki where authorship really matters. Imagine a global collaborative knowledge base for original thoughts. Open access and freely available to everyone.
Scholarpedia - Scholarpedia is a wiki-based encyclopedia that features the English language articles and helpful materials only.