Safari is Apple's Web browser. It's one of the more speedy browsers around, and it was one of the first Web browsers to introduce a built-in RSS reader. It's currently in its third iteration and has traded blows with Firefox to provide the fastest browsing experience on the Web with its rendering engine.
Safari began as an in-house replacement to Microsoft's Internet Explorer for Mac, which Microsoft didn't update or improve on at the same rate as it did for its Windows counterpart--and eventually dropped shortly after the release of Safari.
In 2007, Safari got quite a bit of attention for its inclusion as the default Web browser in Apple's iPhone.
Winner: Apple Safari (Apple.com/Safari)