Safari (web browser) 5.1.7

Apple Safari is a Web browser available for the Macintosh and Windows operating systems as well as the iPhone, iPod Touch and iPad. Safari has been designed based on the premise that the most useful browser is one that "gets out of your way and lets you simply enjoy the Web."
At the heart of Apple's Safari browser is the WebKit engine, which is responsible for functions like displaying graphics, rendering fonts, running Javascript and determining page layout. Future versions of Safari are expected to use Apple's WebKit2 engine, which features a split process model built directly into the framework that enables Web browser processes to run as separate processes in the operating system for improved stability and security.