QuickONF Keys
Documentation

The app

This app is a set of 4 widgets and has no options.
 
Every widget, 1×1 in size, contains 4 little shortcut keys for a total of 16 system preferences.
 
You do not have to install all of them; simply the ones you need. The best of all, you can arrange them in many ways (e.g., forming a square, as seen at the snapshot).

The widgets

Light+Sound

WiFI+Bluetooth

Other Connections

Miscellaneous

[c] Alberto Viñuela Miranda / Cranfcom 2013-2014