Shelf Leveler is a free utility designed for Mac users to level just about anything using their MacBook's Accelerometer. Compatible with Mac OS X 10.4 Tiger, Leopard, Snow Leopard, and Lion, Shelf Leveler does not require any special requirements. Categories include Icons & Cursors, Multiple Desktops, Screensavers, Themes, and Wallpapers.
Launchd(8) frontend for Mac that allows you to manage and debug system & user services with a sophisticated interface.
