Kupfer for Linux 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 plug-in for accessing more objects and running custom commands.
Full Specifications
What's new in version 2.0.8
Version 2.0.8 has fixed bug with nonexisting catalog directories.