I've already posted about this on Pixelation..

I have recently released a brand new version of my 256 colour pixel based paint program D-Pixel. The last version was 4 years ago so it's seen a lot of changes. It's now built on the SDL library and has a resolution independent interface and a more muted graphic style than previous versions.

There are a lot of bug fixes and new features over the last released version. Including: More paint modes, being able to draw sections of a circle / ellipse, a lot more brush tools, tile mapping, and customisable right mouse button and held left and right mouse button drawing modes.

I've done a very quick and super simple website and there is a Dev thread on the TigSource Forums for people who are interested. I am also on Twitter and posting about D-Pixel under #DPixel.

Check it out if you are interested (it's completely free and unrestricted):
http://www.retroidea.com

Example of the new interface: