is a program to change, speed up and make everything about files and programs more fun on your computer. Kupfer is heavily inspired by Quicksilver; you use it to summon an application or document quickly by typing the first parts of its name. It can also do more than getting at something quickly: there are different plugins for accessing more objects and running custom commands.
Install Kupfer in Ubuntu 10.04/9.10
Open terminal and run the following commands
sudo add-apt-repository ppa:kupfer-team/ppa
sudo apt-get update
sudo apt-get install kupfer
You can check here for kupfer tips.