Today only: Amazon’s has Wave Launcher in the AppStore for Android for FREE for a limited time. Deal expires May 8, 2011.

Wave Launcher is a unique, gesture-enabled, quick action-bar for Android. It resembles a well-known and loved feature on WebOS phones like the Palm-Pre, and works throughout your entire operating system.

Regardless of any application currently running, you can swipe you finger from the virtual gesture-area at the bottom of the screen towards the middle to show the wave–A fully configurable quick-launch action bar.