Drawasaurus - Drawasaurus is an online drawing & guessing game you can play with friends or strangers.
gartic.io - Draw, guess, and win!
skribbl - Word guessing based on drawing.
Cast-a-Draw - Pictionary style party game for Chromecast on Android
Drawception - The browser-based party game that combines the telephone game with drawing! Hilarity ensues.
iSketch.net - A thrilling pictionary online game in various languages.