Tynker - Game Worlds for Kids to Learn Programming
Lichess - The complete chess experience, play and compete in tournaments with friends others around the world.
CodeCombat - Learn programming with a multiplayer live coding strategy game.
Lucas Chess - The aim is to play chess against the computer with increasing levels of difficulty and with a...
StackHive - Design, develop or publish websites right from your browser
Chess.com - Play chess on Chess.