This is a very simple app to mute your android when you plug it in to charge, and unmute it when you unplug.Theres also a widget that you can tap to mute and unmute. The widget will also display the current audio mode the phone is in (Muted, Vibrate, Sound on).It works great if you charge your phone on the bedside table and dont want email and calls waking you at night.
PowerMuter
