Quote Originally Posted by xt0rt View Post
I am shocked and appalled that nobody has mentioned the GIMP (http://www.gimp.org/).

Aside from being free, this software has many of the features available in Photoshop and Illustrator. Scripting support as well, for those of you who need to batch large repetitive tasks.

Native to UNIX/Linux, with stable versions also available for Windows and *chuckle* Mac OS X.
View POST3 of this thread...afo did mention Gimp..