Slingscold - Slingscold is a lightweight application launcher similar to Launchpad in Mac OS X.
Executor - Executor a windows launcher
Listary - Listary is a revolutionary search utility for Windows
Keybreeze - It's a small toolbar that you can activate by pressing a hotkey.
Scherlokk - Mac OS X application. Simple and user friendly, Scherlokk will find your media and missed files - quickly.
Keypirinha - A lightning fast and flexible keystroke launcher for Windows. No installation required (portable).