Note: GIMPshop is no longer under development and the developer provides no support for it.
GIMPshop is a Gimp modification that features menu layouts, dialogs and naming conventions similar to those found in Adobe Photoshop. Photoshop users should feel right at home using Gimpshop. The Gimp, on which Gimpshop is based, is a powerful, open-source image editing application. For more info on the Gimp see this page. Gimpshop is essentially the same program with some cosmetic changes.
Note: Although Finder indicates that this is version 389, the developer states that this is version 2.2.11