PaintCAD is a freeware J2ME application for Java J2ME based mobile phones like Motorola, Nokia and Sony Ericsson that allows you to draw wallpaper/picture graphics on your mobile device and save them in the following formats:

BMP 2 bit (black-white)
BMP 256 colors (8 bit)
BMP 24 bit
WBMP 2 bit
BMX animation

And with MIDP 2.0 compatible devices, you can open and edit PNG, JPG and SVG graphics as well. The maximum editable size of the image depends on your device’s screen resolution.

Download here