Before the relatively recent introduction of Safari to mobile, there were only one big giant at mobile web browsing, Opera. They are now launching beta for Opera Mobile 9.7 which comes with new features:

# Opera Turbo: Advanced compression technology to speed up data transfer and to reduce the amount of data that needs to be downloaded.
# Opera Widgets: Small, handy standards-based Web applications that run locally on you phone, giving you one-click access to your favourite web services. (really cool)
# Opera Dragonfly: Open source cross-platform developer tool.

Head here for more information and download.