Lexica - An open source word-search game.
skribbl - Word guessing based on drawing.
Crosswords Arena - Word game, multiplayer and computer players
LetsDraw.It - Guess and Draw, Drawing Battle, Pictionary, Copy picture - online drawing games where you can compare your skill with others.
Word Domination - Word Domination is a fast paced and addictive real-time word game.
gartic.io - Draw, guess, and win!