Google Talk and Google Hangouts for Ubuntu

Google Talk is a browser plugin that lets you voice and video chat with friends and family from your browser. Install this plugin and logon to Gmail with your webcam and microphone attached to your computer, then initiate a chat with a friend or family member. It will try to connect to your webcam and enable video chat.

wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo apt-key add
sudo sh -c 'echo "deb http://dl.google.com/linux/talkplugin/deb/ stable main" >> /etc/apt/sources.list.d/google.list'
sudo apt-get update
sudo apt-get install google-talkplugin