PocketCam for Android - PocketCam allows you to use your Android device as a wireless webcam and microphone for your desktop computer. The app automatically forwards video captured by your mobile device's built-in camera to your computer using a WiFi connection, which can then be used as if it comes from a virtual webcam
MiLife automatically silences your phone as your meeting (or movie) begins and brings the phone back to normal mode when the event ends. Hence you're not bothered by calls and/or alerts when you are busy