[Parkar]

md2 Tools (md2 should be considered depricated, please use md3)

Quake 2 modeller
http://www.planetquake.com/q2utils/reviews/q2mod.html

md3 Tools

NPherno's .md3 Compiler
http://dl.fileplanet.com/dl/dl.asp?q2pmp/NMD3C.zip

PNG Tools

OptiPNG: Advanced PNG Optimizer
http://www.cs.toronto.edu/~cosmin/pngtech/optipng/

PNGOUT
http://advsys.net/ken/util/pngout.exe
PNGOUT tutorial
http://advsys.net/ken/util/pngout.htm

32bit to 8bit tools

Bright
http://udn.epicgames.com/Two/Texture.../bright181.zip

Image editors

the GIMP (open source)
http://www.gimp.org/

Photoshop (commercial)
http://www.adobe.se/products/photoshop/main.html

Paintshop Pro (commercial)
http://www.corel.com/servlet/Satelli...=1047025487586

Wally (freeware) (can also browse and edit art files)
http://www.telefragged.com/wally/

3D modelers

Blender (open source)
http://blender.org/cms/Home.2.0.html

Milkshape (commercial)
http://www.swissquake.ch/chumbalum-soft/

3DSMAX (commercial)
http://usa.autodesk.com/adsk/servlet...112&id=5659302

Maya (commercial)
http://www.alias.com/glb/eng/products-se...amilyId=3900009