...and Perl. What makes it special? Integration with WebKit opens up platforms which use it, such as Apple's Safaribrowser (used in the iPhone), Nokia's Series 60 browser, Google's Android platform, and the Adobe Integrated Runtime...
http://www.computerweekly.com/Articles/2008/07/14/231461/hot-skills-qt.htm
...source web browser engine used by tens of million of people who have never heard of it. It's the basis of Apple's Safaribrowser, implemented on iPhones as well as on Macs. Nokia uses WebKit for its mobile browsers, and it's part of Google...
http://www.computerweekly.com/Articles/2008/07/18/231533/hot-skills-webkit.htm