Graphic Foundry - High-impact audio reactive music visualizers 💎
skribbl - Word guessing based on drawing.
cmd.fm UI - Music visualized and controlled via a command line interface
LetsDraw.It - Guess and Draw, Drawing Battle, Pictionary, Copy picture - online drawing games where you can compare your skill with others.
SYQEL - Bring your music to life
gartic.io - Draw, guess, and win!