Webcam indicator for ubuntu

sudo add-apt-repository ppa:phobosk/phobosk-ppa
sudo apt-get update
sudo aapt-get install cameramonitor

Using Camera monitor

• Launch cameramonitor on command line: cameramonitor
• Or from GNOME menu: Applications → Sound and video → Camera Monitor
• Change preferences on command line: cameramonitor -p
• Or from GNOME menu: Preferences → Camera Monitor

Ref: http://www.ubuntugeek.com/camera-monitor-system-tray-icon-that-notifies-you-when-your-webcam-is-on.html