GIMP is also known as the GNU image manipulation program. It is an open source software, and it also a freeware. It is available for free and will remain available so. It does not have any commercial version, therefore you can expect fully functional software. It is available for Windows, Linux and Macs. You can use it for all of your photo editing needs. It is popularly known as the best free alternative to photoshop. Since its conception it has come a long way, and you will find it no less than photoshop in its sophistication. For windows users there is an installer available for download form their website, gimp.org
The current stable version available for download for windows is GIMP 2.6 . It is about 15.1 MB of download. It is pretty small compared to the commercial photo editors. apart from the GIMP main program there are several plugins available for download which you can find on the same website.
