I was looking at Drawn! today and found this fun little flash-based web app, Odosketch. It has a limited pallette and brush sizes, but sometimes I need limits imposed on me to spark my creativity. It's also limited in a lot of the same ways traditional painting is... no undo, no zoom, and if you paint too much in one area with certain colors, you can't go in and paint over it anymore. That was frustrating, but worth noting for next time.
Here are two sketches I did, and to my surprise they both ended up in the 'Featured' section!
Here's the fun part... click the images to watch them drawn from scratch!