5 Nav Launcher 2.0.5
(Edit)Launch up to 18 different applications per hard key all within a couple of seconds using only two button presses. How? With your shiny new Palm 5-Way navigator switch.
Bind 5 Nav Launcher to one of your hard keys, then hold down a direction on the 5 Way navigator to cycle through four applications per direction. Launch a 17th application with the select button, or launch an 18th application if you don't press anything. If you want to launch even more applications you can use additional 5 Nav Launcher "shortcuts", each of which adds another 18 launchable applications.