Qt is a cross platform set of libraries allowing developers to use the same front-end code for MacOS X, Windows and Linux (as well as other embedded system like Symbian, INFINITY, VxWORKS and QNX). Qt was originally developed by Trolltech which Nokia bought in 2008.
Nokia has lost its way in recent years having dropped its lead in the mobile phone markets (though it still has a large base in 3rd world countries) as is now concentrating on a smartphone market using Microsoft Windows Phone.
Digia is hoping to further develop Qt which has been used by over 450,000 developers and Digia is hoping to rapidly support MS Windows 8, Google's Android and Apple's iOS.
The commercial version of Qt will be maintained at Digia and the open-source variant at Qt-Project.
