http://www.sausage.com/reptile-free.htmlReptile. 2D tile making program has lots of effects.
http://harmware.com/stile.htmsTile 99 another nice tile texture generator
http://www.ultimatepaint.com/ultimate paint. Not the greatest paint program but its several steps above MS paint.
(get the freeware version from here, not the trial demo thats listed right above it)
http://www.michisoft.com/programs/sprite/index.htmsprite consttruction tool. for making 2D sprites like used in 2D games
http://www.michisoft.com/programs/vbloade.htm need VBrun300.dll to run it, get it here
http://www.resene.co.nz/ezypaint/main.htmez paint. pretty cool tool actualy. take a few scren shots of your level prior to texturing, now using ez paint, you can experiement with colors etc till you find the right combination.
then when got it right, save and it exports each texture color sample used.
http://www.steffengerlach.de/freeware/Z-Paint. I use this allot to make panels and buttons
http://home.hccnet.nl/h.van.oerle/phomod/phomod.htmPhoto modeler Lite Also this site has 2 additional tutorials for the program.
The tutorials run right inside the program. easy to follow. easy to use.
http://www.v-d-l.com/index.php?section=7&page=25some photoshop plug-ins. I like this one. does various camoflage theams
Has many already pre generated for various nationalties. plus you cna generate your own.
Other plug ins here too like Nightvision
http://park18.wakwak.com/~pixia/powerful paint program toss up if i will ultimatly use this or my copy of photoshop lite. has many of the same abilities of other commercial products. what drew me to this program is its ability to get results like when realy painiting. watercolor washs, color blending, bleeding etc.
http://www.telefragged.com/wally/Wally texture tool and WAD file builder/manager.
http://www.cc.gatech.edu/classes/AY2000/cs4455_spring/planetquake/modediting.htmlqME
to open and work with them older quake and quake 2 models, espeicaly when the skins don't carry over because of the low bit pallette