I figured I do enough with Photoshop that I really should make a static post on credits aside from my links section in the sidebar.
Brushes:
Braggadocio
Petis
The Magic Box
Miss M
1 GreenEye
Angry Blue
Exotica
Mechadiva
VBrush
Insomniac Brushes
8Nero
Cirratus
Alecta's DarkArt
xALIASx
Leichnam

Screencaps:
When not done by me, I hit these kind folks up.
Farscape-Caps
The John and Aeryn site

Textures:
Tre
Gradients:
I haven't really learned how use these yet, but I have saved the ones created by:

Braggadocio
Fonts:
Dafont
Acid Fonts
1001 Fonts
I've also discovered quite a few in the last couple weeks through

*looks around at different links* I think I've got them all covered here. :p