GIMP is in the Angstrom repository already, and I've done a very quick and dirty 20MB PND here: http://www.stuckiegamez.co.uk/apps/pandora/gimp-2.6.pnd with a guide on what I did here: http://www.gp32x.de/board/index.php?/topic/54052-converting-angstrom-apps-to-pnds/ .. be warned that it's a bit untested still, and you're recommended to read that guide to understand what it's doing, and why it asks for your password ( quickly: it installs some symlinks on NAND rather than installing itself to NAND, it needs permission to add a link to /etc/gimp and to /usr/share/gimp and it puts one in ~/.gimp-2.6 for your user install. Three symlinks verses however many files it wants to spread all over the place is pretty good going, I think! ) It's quite a hacky thing to do, so be careful with it
usable till someone does it properly, though!
There's quite a lot of stuff in the Angstrom repository if you're willing to install it either to your NAND, do crazy AUFS hackery ( I've a guide in the Developer's Corner just now on that, and I'm working on something else ), or just create a PND out of the download files like I've done above with GIMP.
Angstrom's package repository searching thing is here: http://www.angstrom-distribution.org/repo/
As for other distros.. I'm sure they'll pop up soon enough
Though I'm having fun mangling the current one at the moment