GIMP is the GNU Image Manipulation Program.
Version 2.8 RC of GIMP is available from http://gimp-win.sourceforge.net/stable.html
Version 2.8 has been announced as:
"We are happy to announce immediate availability of GIMP 2.8 — a new
stable version of GNU Image Manipulation Program that culminates 3.5
years of exciting work.
With this version we are introducing some long-anticipated features
such as layer groups, on-canvas text editing, advanced brush dynamics
and the much desired optional single-window mode. We also started
applying other important changes to the user interface that bring us
closer to matching the product vision.
For detailed information about changes since 2.6 please read the release notes. Source code is available for downloading
from a plethora of mirrors, a build for Windows will soon be available,
and we hope to see a build for Mac OS X released as well."
Linux users already have the released version of GIMP 2.8