Some of the striking features of this latest version are:
Smooth and fast graphics
Everything in Opera is drawn on your screen using Opera's new high-performance Vega graphics library. This enables super fast and smooth graphics, in everything from tab switching to animation on webpages.
Support for Geolocation
You can now share your location with geolocation-supported websites such as Google Maps. Rest assured that your privacy is a top priority - you will always be prompted before sharing your location.
Download using BitTorrent (the really needed feature :))
Support for BitTorrent is built in to Opera so you can download torrents without the need for a separate application. You can even monitor the progress of large torrent downloads with Opera's downloads panel.
Load plug-ins only when needed
You can choose to have plug-ins such as Flash and Silverlight load content only when clicked. This is helpful to speed up browsing on computers that have difficulty handling lots of plug-in content.
The fastest JavaScript engine
The Carakan JavaScript engine has been further enhanced to run more quickly than ever! This makes Opera 11 the fastest browser on Earth in many performance tests. Even complex webpages load and run with lightning speed.
Look inside tabs
When you hover the mouse pointer over a tab, a preview shows you the content of that page. When you stack tabs, hovering over a stack also shows a preview of the tabs within, and you may select the tab you want to use.
Download : Click here
