mtPaint is a painting program designed for creating icons and pixel-based artwork. It can edit indexed palette or 24 bit RGB images and offers painting, palette, and image manipulation tools.
Scheme Maker is an application designed to enable you to create cross-stitch and knitting schemes from images and photos. You can determine width and height of your scheme, the number of colors and stranded thread firm for scheme key.
Painting program aimed especially at creating and editing textures and sprites, but also for general purpose image editing. Rendered with OpenGL.