If you are using Linux than Gnome Do is definitely a cool application to have. Gnome Do is a very popular application launcher. You can search your local hard drive and also the web. One cool feature of Gnome Do is Docky. This will create a dock on the bottom of your screen where you can launch your applications from and it is similar to Mac OS launcher. You can add your favorite applications to your dock for easy accesibility. Also, the dock is very customizable. You can move it on the top of the screen if that is your preference and resize it to your specifications. There are also plugins that enable additional functionality for Gnome Do. Here is a video to give you an idea of the capabilities this neat little application has. If you want nice eyecandy and great functionality than Gnome Do should definitely be installed on your desktop. Here is a link to their website.