GeekTool was released as a free download on the Mac App Store a few weeks ago, and it's remained at the top of the download chart since. It's been around for years, and we've featured it a couple of times on TUAW, but the MAS release allows it to reach a new audience.
Unlike the GeekTool of yore, the MAS version is not a preference pane, but a separate app. It allows users to display various information on their desktops via three plug-ins: file, shell and image. These are referred to as geeklets and can be used as follows:
File: It displays