How to Install Cairo Dock 3 in Ubuntu
Cairo Dock is an OS X like approach to alternative desktop environment. This tutorial will teach you how to install the latest version.
The Easy Way
In Precise, open your Update Manager. Then, click Settings. Under the Other Software tab, click Add. Paste the following line into the box and enter your password when prompted.
Check for Updates.
Now you need to run just one line in the Terminal.
In the Terminal
Installing via the terminal is rather easy.
Once you've installed Cairo, you may switch, with or without Unity/Gnome, and back again when you login, using the Gear icon to the right of your name.