skribbl - Word guessing based on drawing.
QuizUp - QuizUp gives you the opportunity to test your trivia skills against friends and strangers throughout the world.
LetsDraw.It - Guess and Draw, Drawing Battle, Pictionary, Copy picture - online drawing games where you can compare your skill with others.
Buzz! The Big Quiz - Buzz! The Big Quiz is a Trivia, Party, Single and Multiplayer video game developed by Relentless Software and published by Sony Computer Entertainment.
gartic.io - Draw, guess, and win!
Google Feud - The world's most popular autocomplete game. Try to guess what Google will suggest. Webby Award Winner for Best Game. Created by Justin Hook.