Call of Duty 4 Modern Warfare
This is my second skin-pack for CoD4, now. Some are just darker, sharpened, some have new wood textures.
Here are some nice new skins for the CoD4 knife, M14, and P90.
Completely new camouflage skins for all the weapons in CoD4.
Here's a pretty good three-pack of CoD4 weapon skins by Hibana.
Here's a nice new pack of weapon skins by Wilhelm.