GeekTool is an incredible tool that lets you put information on your wallpaper. It is not a tool for beginner users, since you must have some understanding of Unix and shell commands.
One great example of something you can make with GeekTool is found on the Mac App Store page for GeekTool. The screenshot in question shows a wallpaper with a sand dune. Below the sand dune, there is a clock that shows the time. At the bottom, you can see the computer's uptime, and at the top, some weather information. This is not easy to do if you don't know what you are doing, but there are tutorials that show exactly how it is done.
I have toyed with GeekTool in the past, and I have made some nice wallpapers with it. Even if you end up not creating anything great, GeekTool lets you create a wallpaper that fits your need. All you need is some research and creativity.
Pros
- Multiple integrated object types
- Screenshot management
- Quick data updating
Cons
- May fail to save changes
A nice tool that allows you to create your own wallpapers.