GIMP is the GNU Image Manipulation Program, a freely distributed software for photo editing, graphics and image composition. Gimp is currently on version 2.6 and free to download from http://www.gimp.org/downloads/. A Windows XP (SP2 or later) installer is also available.
I (re)tried my hands on Gimp, following this really good tutorial - Advance Orb using Gimp.
If [...]
