Opera is a web browser and internet suite developed by the Opera Software company. The browser handles common Internet-related tasks such as displaying websites, sending and receiving e-mail messages, managing contacts, IRC online chatting, downloading files via BitTorrent, and reading web feeds. Opera is offered free of charge for personal computers and mobile phones, but for other devices it must be paid for.

http://www.ubuntugeek.com/how-to-install-opera-web-browser-in-ubuntu-including-flashjava-plugins.html