It's really about time I made a proper resources thread, the older one has many outdated links, and not enough info.
So, here we are, resources:
Common Image Editing Programs
Jasc Paint Shop Pro
the Gimp (Free)
DaFont (Font Resource)
Imageafter - Images & Textures
Stockvault - Stock Images
deviantART - All Sorts of Images and Artist Resources
Imageshack - free, no strings image hosting.
If anyone has anything they think should be added to this list, post it here and I'll update the list in due course.