Opera
Download the opera web browser for a better and faster internet experience.
http://www.opera.com/download/index.dml?step=2&opsys=macos&platform=macos
Safari
Experience the web, apple style, with safari: the fastest, easiest-to-use web browser in the world. with its simple, elegant interface, safari gets out of your way and lets you enjoy the web — up to 2 times faster than internet explorer.
http://www.apple.com/safari/