Free Art Applications

Ultimate Paint	Paint program for Windows for photo editing and image creation with support for many file formats. Freeware and shareware versions are available. Also has an excellent GIF and JPEG optimizer. Recommended!
ArtRage	Freeware artistic painting program designed to provide a realistic simulation of using paint on a canvas, along with pens, pencils, crayons, and other tools.
Artweaver	Freeware paint program for Windows designed for creatinve painting: realistic brush simulation, artistic effects, etc.
Brush Strokes	Free image editor, supporting GIF, JPEG, BMP, PNG, TIFF, PCX, TARGA and AVI file formats. Also: GIF animations, filters, rotations, transformations, etc.
GIMP	Freeware image editing program for Windows, Linux, X-Windows. The GIMP is the GNU Image Manipulation Program suitable for such tasks as photo retouching, image composition and image authoring.
iMage	Fast and Simple graphics editor for Linux and Windows. Supports 8, 16, 24 and 32 bit images. Excellent at tile editing, cropping and cleaning up images. Supports GIF, BMP, JPG, PCX. Split view zoom and basic graphics file support.
Image Enhance	Free image editor for Windows: bitmap and JPEG images, webcams, digital cameras and scanners, filters and effects.
ImageForge	Freeware for Windows. Create and edit images, acquire pictures from your scanner, digital camera or other Twain-compliant device, apply special effect filters, produce your own photo albumsand simple slide shows, and much more.
Paint.NET	Freeware paint program for Windows 2000, XP, Vista, or Server 2003. It supports layers, unlimited undo, special effects, and a wide variety of useful and powerful tools.
Painter 25	Free image editor for Windows. Features: backdrops, effects, and filters, banners, GIF and JPEG optimizer, airbrush, textures, clone, morphing, mirror, flip whirl, etc.
PhotoFiltre	A complete image retouching program. It allows you to do simple or advanced adjustments to an image and apply a vast range of filters on it.
PhotoPlus 6	Free professional photo editing program from Serif Software.
Pixia	Very nice freeware paint and image editing program for Windows.
Texture processor	Free program for creating various textures. Texture Processor is intended both for 3d-artists and web-designers. Windows.
TwistedBrush Free Edition	Freeware paint program very suitable for creating artistic images and effects.
VCW VicMan's Photo Editor	Freeware photo editor with intuitive skinnable interface and a variety of features. Windows.