Appwatch is a simple application launcher for Mac OS X. It observes the applications that you launch and quit, and builds a menu of "Recent", "Frequent" and "Long-Running" applications. The only UI is the Menu Bar Icon, and the menu itself (and some preferences dialogs).

You can use the mouse, or press ⌘-esc (apple-escape) to activate the menu.

It's Tiger (10.4)-only and won't work on older versions of OSX. It stores all of its collected information in a SQLite (the engine used by Core Data) database file located at ~/Library/Preferences/AppWatch.db

You can download version 1.0 at http://fbm.bentpixel.com/AppWatch-1.0.zip (68k).

** UPDATE: New version (1.01, universal binary) is here.

AppWatch is completely free, but if you use it, please consider donating $5.00.