Sidebar Lite is a fancy tool which gives you the opportunity of adding a sidebar on your Android device. It works on a drop-down system and the original position places the sidebar at the left side of the screen. You're not forced to keep it inside this position and you can change it to the opposite direction. The actual overlay comes with a clean design and you have control over the size of this area.
The whole purpose behind this tool is to allow you to pin your favorite and most used apps inside it. You are limited to 8 shortcuts in total, but this should be enough for your most important apps. The good thing about Sidebar Lite is that it was developed to not cause a big impact on RAM use and battery life.
There are many widgets for your to choose from including ones for GPS, Home, App Drawer, Bluetooth, Sound, Brightness, Torch, Rotation, Wi-Fi, Mobile Data and even controls for playing music. The nice thing about this sidebar is that it launches when your Android operating system starts. It won't be required for you to launch the application.