GIMP is modular, expandable and extensible. It is designed to be augmented with plut-ins and extensions to do just about anything. The advanced scripting interface allows everything from the simplest task to the most complex image manipulation procedures to be easily scripted.
From the user's point of view, GIMP 2 is fundamentally similar to GIMP 1; features available in the older version are still available in GIMP 2.0. However, a huge amount of work has led to a complete restructuring of the GIMP internals. The GIMP 2 code base is significantly better organized, more maintainable and more easily extended than was the case for earlier versions.
Note: You will need to download both GTK+ Runtime Environment and The Gimp installers. Install GTK+ before installing The Gimp.