NeoPaint

Powerful Windows paint/image/photo editor. Supports Animated GIF, JPEG, PNG, BMP, ICO, PCX, TIF and more. Includes many paint and photo retouching tools, layers, alpha channel, levels/histogram, natural media and custom brushes, 2D/3D shapes, soften, sharpen, special effects, masking, textures, color separations, stamps, multi-level undo, rulers, grids, gradients, image browser, screen capture and more.