Get pop-up notifications for iTunes track changes, new email, and many other things.
Adds tabs to Finder windows and enables dual panel mode.
iOS-style task switcher for Mac OS X.
Collapse windows to their title bars and minimize in place.
Move, fullscreen, and pin windows using the green zoom button.
Allows you to remove the irritating chime of your Macintosh at startup.
launcher and organizer for apps, docs & links
Adjust screen brightness from the menu bar, just like with volume.
Change your display colors in ways more suited to low light conditions (such as at night).
Completely customize your Dock's appearance with themes.
Quick Look plugin that reveals package contents.
Silence your Mac's startup chime in Lion.