Home Button on the status bar.
If you feel click the home button is a bit long to wait the response or your button is broken or bad to use, this app can help you do the same thing. Slide from the status bar, and click the "Home Button", it will back to the home frame.
If you want to hide the item from the status bar, you need to click the app again, and hide it.
Thanks http://www.awicons.com providing the free home icon, and the "Icons by Lokas Software"