Graphics Application
Applications used for working with textures and [Texture creation]?:
- UPaint
- UT Skin Maker – Automates the process of skin package creation.
- UTX-Viewer – Extracts and creates texture packages.
- Wally – A freeware texture editing program.
I-Tex
Shareware.
Very powerful creation program - not the easiest to use but once you're started you can produce good stuff.
Wally
http://www.telefragged.com/wally/
Freeware.
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The Gimp
GNU license.
Very powerful graphics editing program comparable to Photoshop. Works best under Linux, Windows version exists but is very flaky
TexSynth
http://users.chello.be/sf15772/texsynth/
http://www.bpeers.com/software/texsynth/
Freeware?
Kind of a texture wrapping utility...
PhotoShop
http://www.adobe.com/products/photoshop/main.html
Commercial Product
No description required. Probably the best graphics editor about.
The Clouds and Difference Clouds filters create nice Terrain heightmaps!
Paint Shop Pro
Commercial Product. (Evaluation copy available for download)
Getting better with each release. Almost comparable to PhotoShop. Unfortunately it's also becoming just as expensive.
WARNING – PaintShopPro alters a ton of windows file associations without asking. At least it did about 5 years ago, I haven't touched it since. It's taken me that long to fix my registry 
ZxAnPhOrIaN: It didn't alter my windows file associations. .jpg (JPEG) files still open up in Internet Explorer! 
Pixia
http://www.ab.wakwak.com/~knight/
Freeware package
Just translated into English (from Japanese). More "airbrush" style then "drawing" style.
(Untitled) Image Utilities
http://www.kerlinsoftworks.com
Donationware
A collection of previoulsy commercial products bundled into one package. The ~10M download includes Eleblend (terrain texture blending, artificial texture aging), Ripple Rain (animated water ripple bump maps, animated alpha channel rain maps), Mosaica (creates mosaic with matching bump map), Gradient Thief (multicolor gradients from existing images; good for skyboxes perhaps), and UT Screenshot Assistant (a batch resize/thumbnail image processor with image correction).
Related Topics
- DXT
- Application – other types of software
