OSX Themes
[unsanity] ShapeShifter - Haxies - Freeware and shareware Mac OS X hacks that enhance the way Mac OS X works; includes WindowShade X, FruitMenu, Xounds, Silk, Menu Master, FontCard, ShadowKiller, Dock Detox and more.
see also : "Wired":http://www.wired.com/news/mac/0,2125,61441,00.html