I'd like to implement a very simplistic image editor (similar to http://mugtug.com/sketchpad/ ) on my website, so that users can have a trivial playground... Say I have a black and white sketch (png) that I want to let them color.
In theory I could develop the entire thing using Canvas, but I'm hoping something like that is already developed. All I need is "paint brush" tool and "fill bucket" tool ... that's it.
This is the closest I found, though i think it's not the best implementation: http://athousandnodes.com/labs/canvasFun/
Are there known better solutions?