I've been looking for some online drawing tools so that if I want to make a quick sketch I don't have to photoshop every time. Here's what I've found.
turns a simple line drawing into a detailed generated picture, ala Harmony.
Kinda hard to explain- like scribbler except the fuzziness and generative part happens as you draw.
Sling paint like Jackson Pollock. Click to change the pain color.
When you don't wanna fire up photoshop, these are some pretty good online alternatives.