Just about a week after open source image editor GIMP 2.6.1 was released, a portable version is available. What makes GIMP 2.6.1 Portable different from the original application is that you don't have to install the portable edition on a computer to run it. You just download the application, run it once to unzip it to a directory of your choice, and then you can run it from that folder. In other words, you can unzip it to a USB flash drive and plug that drive into any computer you want to use GIMP on.

GIMP Portable is part of the Portable Apps suite which also includes portable versions of Firefox and OpenOffice.org. The portable applications are Windows only, although most of the applications are open source and capable of running on Windows, Linux, and in some cases, OS X. You just need to install them the old fashioned way on Linux and Mac systems.