Manuel Wrage

Immersive Mode Manager

Paid

Enhance Your Android Experience with Immersive Mode

Hide Navigation Bar -- Rootless

Free

A Practical Tool for Hiding Navigation Bar

Vivid Navigation Gestures

Paid

"Gesture control" is the next big thing on android and ios.

Pie Controls -- Swipe Gesture Navigation

Paid

Pie Control is the perfect companion for your day to day phone usage.