Valet

Valet records the applications that you use and provides quick and easy access to them. Valet is the nearly zero-configuration application launcher you have been waiting for.
Valet watches as you launch applications, allowing you to categorize them on the fly.

The next time you need one of those applications, use Valet to quickly launch it with the heads-up display or a menu bar icon.
Valet's features include:
- Automatic detection of new applications
- Detects applications already running each time Valet launches
- Quick launching or switching of applications using voice control, heads-up display or menu.
- Access to MS Windows applications via Parallels
- Flexible categories for organizing your applications
- Growl support for hassle-free notifications
- Intel and PowerPC support (requires version 10.4.x)