http://www.gimp.org/macintosh/
You need to have X11 installed, but then it just works fine. For many simpler things I like to use Seashore. It's based on GIMP source, but is native so doesn't requier X11.
ArtRage http://www.artrage.com/artrage.html while probably not what you're looking for, is pretty fun too. You need the $20 version if you want alphas, but the basic version is free.
Claus: Thanks for pointing out Pixen, hadn't seen that one.
Ragnar
You need to have X11 installed, but then it just works fine. For many simpler things I like to use Seashore. It's based on GIMP source, but is native so doesn't requier X11.
ArtRage http://www.artrage.com/artrage.html while probably not what you're looking for, is pretty fun too. You need the $20 version if you want alphas, but the basic version is free.
Claus: Thanks for pointing out Pixen, hadn't seen that one.
Ragnar