Call of Duty 4 Modern Warfare
Here's a neat new set of skins by a new developer known as Rockyrhodes that gives you the Australian AUSCAM camo skins for your CoD4 USMC.
Here are some great new SAS skins for Call of Duty 4 by rubberduck that give your soldiers urban BDU camo.
Here is another really good looking skin from Tri-Tard. This time changing the Russian loyalists camo from its blue to a solid green.