The GNU Image Manipulation Program, or GIMP, is a raster graphics editor used to process digital graphics and photographs. (GPL)
Linux - FreeBSD - Windows - MAC OS X
LazPaint is a free cross-platform image editor with raster and vector layers. It supports the OpenRaster format so it can interoperate with MyPaint, Gimp and Krita. (GPL)
Linux - Windows - MAC OS X
Pinta is a drawing/editing program modeled after Paint.NET. It's goal is to provide a simplified alternative to GIMP for casual users. (MIT)
Linux - MAC OS X
Tux Paint is a free, award-winning drawing program for children ages 3 to 12. (GPL)
Linux - FreeBSD - Windows - MAC OS X
4 applications