GIMP

The Gimp is the GNU Image Manipulation Program, a sophisticated cross platform image editor. The Gimp is Free Software.

The Panorama Tools Plugins are available for the Gimp.

The Gimp is available for Windows, OS X and Unix. For Photoshop users, there is an experimental GIMPshop with a similar menu layout to Photoshop.

Gimp drawbacks

• The gimp doesn't currently support greater than 8 bits per pixel, ie. is doesn't support 16 bit per pixel high Dynamic Range images, though this is a target for future versions. However, there is a fork of the Gimp called Cinepaint that already supports 16 bits per pixel.

• The gimp doesn't support CMS color profiles for anything more than simple conversions.