LXer: GNOME Do is a Quicksilver Clone
 

Published at LXer:

Do, is an application to find things on your system and quickly perform actions, similar to Quicksilver for OSX and GNOME Launch Box. It works on a variety of different desktop environments, including GNOME and KDE. Basically, all you need to do is to press Super + Space on your keyboard, and the Do dialog will open.

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