A free app for Android, by Jawomo.
GesturePlus - Gesture Navigation is a handy gesture-based navigation app with an Android platform that allows you to navigate your phone using gestures.
This app allows you to do several things, like turn the screen off, take a screenshot, and more. You can use gestures to navigate through your phone, and you can combine them with the built-in action buttons to make the experience even better.
How to use GesturePlus:
To use GesturePlus you need to install it first. Once you install it, open the app and follow the installation instructions to finish the setup.
Now you can use GesturePlus.