Lexica - An open source word-search game.
Word Domination - Word Domination is a fast paced and addictive real-time word game.
Crosswords Arena - Word game, multiplayer and computer players
Wordigami - Rearrange letters so that each row and column spells a word.
Tanglet - Tanglet is a single player word finding game based on Boggle.
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!