The new Opera developer stream is now available.What’s new in this new opera 17 developer?
Start up mode option – last session, speed dial, set of pages.
Rocker gestures – (left->right click, right->left click)
Extension APIs for bookmarks, commands, omnibox, webNavigation.
Search engine manager – now customize your searches.
Themes with backwards compatible – themes that worked in Opera 12 will work in Opera 17 Developer.
HiDPI Support (Windows).
Download Opera 17 developer for windows