OS X UI tweakery.

The screenshots of old versions are making me all nostalgic.

iLeopard is a free theme for Mac OS X that looks gives the look and feel of iTunes 7 to all the interface

"Liquifile is a new file browser for Mac OS X. An alternative Finder, if you will. It is designed for visual thinkers who want to get a bigger picture of their files and feel them more directly."

An OS X-style admin interface for WordPress.

"Witch lets you access all of your windows by pressing a shortcut and choosing from a clearly arranged list of window titles.'