Draw! Free

Draw and flash on the go! For easy finger communication in loud places, quick notes or to keep kids entertained.

Free with ads.

PS: In case Draw! doesnt work, try it with Compatibility mode and restart app

Features:

Colorpicker
Pen width control
Saving to Gallery
Delete (with longpress)
Duo Pens
Eraser
Send email/MMS etc
Preferences
Twitter with Twitpic, Posterous or Tweetphoto
Multiple sets
Slideshow
Multiple undo
Panning
Importing backgrounds
Curved text adding with gesture recognition
Flip `n shake
BONUS mini game: Red vs Blue
BONUS mini game: JigSaw!
Live Wallpaper

...see also the Tips and Tricks page