This is basically a simple, self-centered pixel art application designed to meet my own desires when making simple spritesheets. It's designed to be straightforward and efficient whilst supporting live animation previews and quick workflow. It's not particularly feature heavy and it's certainly not meant for others to use but I'm happy to share the most recent (least broken) version in case anyone wants a peek.

Click To Try It Out Chrome: supported
Firefox: supported
IE: supported (but I don't trust it)

PixelWIP currently uses JSColor available from jscolor.com for the color picker dropdown - a simple and customisable color picker plugin for Javascript apps. Awesome stuff.