I will continue to update this section with resources, but my goal is to keep it down to resources of high quality instead of a huge link list.

Vector Downloads / Resources

http://www.vecteezy.com/
Huge index of free vector downloads for many categories.

http://www.braincorp.it/exp/vectorlove/
High quality free vectors for non-commercial use.

http://www.brandsoftheworld.com/
Extensive collection of vector logos from companies worldwide.

http://vectormagic.stanford.edu/
Amazing auto-trace tool, blows Adobe Illustrator's "live trace" out of the water.

Photoshop Downloads

http://www.filterforge.com
Great utility for generating complex patterns through Photoshop. Extensive controls allow you to make just about anything.

Illustrator Downloads

Check back soon!

CSS / Web Design Downloads

http://www.mikeindustries.com/sifr
sIFR (Scalable Inman Flash Replacement,) great for rendering text SEO-Friendly without losing the typographic look and utility.

Search Engine Optimization (SEO)

http://www.addme.com
Free and paid services; add your url to several search engines, get tools to increase traffic and more.

Programs and Software Utilities

http://www.color-wheel-pro.com/
Color Wheel Pro: allows you to create color schemes using standard themes such as monochrome, analogous, complementary and triadic, with sample websites, logos and print materials that automatically update to the color scheme.