As easily understood by the name of tweak, SwipeAway is a new app for jailbroken iOS devices that allows you to close all applications running in the background with a simple swipe gesture.
SwipeAway closes all applications running in the background on your iPhone in just couple of seconds. How to do it? Simply select a specific activation gesture between those made available in Settings: Swipe up or down, to close all applications.
If you are interested in this tweak, you can download SwipeAway from ModMyi repository in Cydia. The tweak requires iOS 4 or later jailbroken version.