SketchParty TV - SketchParty TV is a high-tech drawing game that plays a bit like Pictionary.
draw.io - Online diagramming application
Think with Google - Put Google research and insight behind your thinking.
Talent Pool by Minty - Reach award-winning illustrators for your projects
7 Seconds - 600+ dumb and crazy challenges to face within 7 seconds
LetsDraw.It - Guess and Draw, Drawing Battle, Pictionary, Copy picture - online drawing games where you can compare your skill with others.