Via Plastic Bugs:
Gimpshop 2.2.11 Universal App and Source: Gimpshop 2.2.11 Universal Application (85 MB) for OS X Tiger (Intel & PowerPC) and Panther.
Want to complie Gimpshop for other operating systems? Get the Gimpshop 2.2.11 source (13 MB) and start hacking.
Thanks to your generous donations - with a very special thanks to Wil Shipley and the Delicious Monster guys! - a Universal Gimpshop App [...]
GimpShop moves from In Dev to Universal on my Mac Intel Universal Binary App Port Progress List. This is excellent news as I've really come to love GimpShop. There's nothing I can do in Photoshop that I can't do in GimpShop. (Note the key pronoun in that sentence. YMMV.)