The final, non-beta release of Opera 11 has hit the interwebs. It promises to deliver big changes and a bucket load of smaller refinements. Amongst the biggest of these is what the team at Opera are calling "tab stacking" - which lets you create groups of taps to manage dozens of open web pages more effectively.
Another addition is "visual mouse gestures" which is kind of like multitouch gestures but, with a mouse. Opera 11 now includes extensions, along with a new and improved address bar. There's also a built-in mail client dubbed "mail-panel".