Free Android App: Smart Touch (Pro - No ads) at Google Play
Smart Touch is an easy touch, assistive touch tool which using a powerful floating ball on the screen to use frequent shortcuts, functions or application quickly and easily.
Smart Touch also provides one hand feature to perform physical key easily.
It supports some other useful features such as: Screen shot (Screen capture), Screen Recording, Ram booster (Ram Cleaner). You can also quickly access to all your favorite shortcuts, favorite applications, games, settings and quick toggle too.
In another hand, Smart touch seems to be a type of Smart Intelligent Assistant. It is very useful for big screen smart phone.