UC Browser is an alternative to Internet Explorer on Windows Phone, one of the first of its kind. It's been around for some time (it was on Windows Mobile) but only supported Chinese for the Windows Phone build which under went beta testing a few months ago. The browser was recently updated and now has language support for English.
UC Browser is a well designed web browser and pages loaded with a little zip. There's still some work to be done to complete the transition to English and a few features we've yet to discover. But all in all, if you're looking for a change of pace from IE9, UC Browser is worth a try.