Wikipedia - Wikipedia is a free online encyclopedia, created and edited by volunteers around the world and hosted by the Wikimedia Foundation.

Six Degrees of Wikipedia - Find the shortest path between two subjects

Miraheze - Miraheze is a wiki farm (hosts wikis) for free and with no ads, it also provides custom domains...

Intch - Professional networking app

Encyclopædia Britannica - Explore the fact-checked online encyclopedia from Encyclopaedia Britannica with hundreds of thousands of objective articles, biographies, videos, and images from experts.

Keyma.sh - A competitive online multiplayer typing game.