UB Browser, one of the most popular mobile browsers is now available for Windows 8. The Windows version is called UC Browser HD. It features a simple Metro UI, can synchronization your bookmark with your mobile devices and has password and download managers.
The browser supports x64, x86 and ARM so it will work on both Windows 8 and Windows RT devices.
Right now it's available for Chinese users users. We will have to wait for a few days for the English version.