FreeGameDev

Just found a very neat program to do procedural texture generation

It also supports bump and normal maps

http://neotextureedit.sourceforge.net/index.html

There is also http://www.fxgen.org/ but I can't tell what the status on the linux compabability is.

Hehe I'm testing MapZone atm.

For some time I used CrazyBump to make textures (non procedural), but my trial period has expired. I was able to extend the trial period for some months by changing my PC clock till I forgot it *lol*.

Another program that I need to test is xNormal. I think it's similar to CrazyBump.