skribbl - Word guessing based on drawing.
Courtmatics Smart Tennis Coaching System - Instant coaching & detailed feedback on your tennis game
LetsDraw.It - Guess and Draw, Drawing Battle, Pictionary, Copy picture - online drawing games where you can compare your skill with others.
Thunderpod - The Fitness Game
gartic.io - Draw, guess, and win!
Smash Tennis - Makes finding tennis partners easy