Opera 9.5 alpha codenamed Kestrel :

Opera launches its alpha release of the favourite sexy and slim web browser.This alpha release is now out for testing purposes only.For everyday use please continue to use the stable version of Opera.To see of the new features and advancements use Kestrel. Whats new in Kestrel? 1)Easy Synchronisation with My Opera(helps you to sync with your browsing preferences) 2)Full History Search 3)Status bar with Zoom and Image control 4)Restore closed windows and changes in Speed Dial 5)Improved BitTorrent™ performance 6)Platform integration 7)VoiceOver support 8)Better Skins 9)Improved Mail Client and much more... Try it out now.
NOTE: Opera 9.5 alpha will by default install separately from your previous Opera version. If you choose to install it on top of your previous installation, please make sure you have proper back-up of Opera and Opera Mail.