If you are looking for a quick way to mute your Android smartphone, a new Android App called RD Mute mutes your smartphone when its placed facedown on a surface together with other handy features to notify callers you are driving.
The RD Mute application is free to download and offers a useful car mode feature that can either be started by flipping the phone on its face or when the GPS registers a travelling speed of 31 mph. It will also automatically SMS anyone who calls you while driving to notify them that your at the wheel and will contact them later.
The RD Mute App has been tested on Android 1.6 and the HTC Hero and is a great alternative to the paid app Tasker $5 that offers a similar service.
You can now download RD Mute for free from the Android Market.