Ok, according to my blog stats, you guys are hungry for content creation stuffs. So here ya go!
Tons of tutorials for tons of programs like: Gimp, Illustrator, Paint Shop Pro, Photoshop, Blender, Maya
More brushes for photoshop.
Get Gimp for free.
Tons of information about programs, and the programs in some cases are available on the Second Life Resident Resources page. Pick a subject and click through.