Docusaurus - Easy to maintain open source documentation websites
YouClap - Challenge and be challenged by friends and brands.
Documentation Agency - We write your product or library documentation.
Finger Tap Challenge - Finger Tap Challenge is a simple challenge game that involves two players who will have to tap on the screen as fast as they can to win the challenge from the opponent.
Devhints - TL;DR for developer documentation
Spinnner - Challenge your friends to a spin-off (literally)