Learn JavaScript - Learn JavaScript with guided tests and flashcards
Tanglet - Tanglet is a single player word finding game based on Boggle.
JavaScript.com - A free resource for learning and developing in JavaScript
Crosswords Arena - Word game, multiplayer and computer players
The Ultimate SaaS Quiz - Challenge your friends and improve your SaaS knowledge
Quackle - Open-source word game similar to Scrabble. Features a board editor, analysis tools, and artificial intelligence that rivals the best players in the world!