GIMP, the GNU Image Manipulation Program, is a widely used and respected open source graphics program, especially attractive because it runs on Windows, the Mac and Linux. Originally created at U.C. Berkeley
its interface and feature set run neck-and-neck with expensive proprietary graphics programs, and it has a huge community of developers and plug-in creators. The
GIMP site has many useful resources for the application, and you can find an increasing number of ways to imbue GIMP with all the smarts of applications such as Photoshop. Here's our updated collection of great resources for GIMP, including instructions on using Photoshop filters with it, a full-length free online book, and more.?