- Gimp - Powerful graphic design program
http://www.gimp.org/
Available for all major and a bunch of minor operating systems. This is the
granddaddy of free graphic software.
- Gimpshop - Open source “substitute” for Photoshop
http://plasticbugs.com/index.php?p=241
Windows, Mac and Linux versions are available.
You can find a lot of good info and resources for Gimp stuff at:
http://www.gimp-savvy.com
- Photoplus - More free graphic software
http://www.freeserifsoftware.com
will let you use some Adobe filters.
- Pixia - Yet another free graphic design program
http://park18.wakwak.com/~pixia/