TwitPaint lets you paint graffiti and post it on Twitter.
Make graffiti in 140 strokes or less and share with your followers.
How do I use it?
Your followers can remix and update your work by doing the same thing with a reply @you.
Expand your definition of graffiti art: play board games, brainstorm, or paint the next Mona lisa with your friends.
How do I Sign In?
TwitPaint lets you sign in with your existing Twitter account or you can create one for free at twitter.com.