X-Button is a tool developed by HTC that enables the X button to really close programs. Can be setup to end programs by tapping “X” or by tapping and holding “X”.

Every time you open an application and close or tap the X button, it doesn’t actually close unless you close it out through the system’s task manager which takes 7 taps minimum.

Leave a lot of apps open and it will slow down your device and consume power faster.

HTC developed a freeware called X button where you can access the task manager on the home screen. Click here to get the X-button