Qt is a cross-platform application and UI framework that allows developers to write applications once and deploy them across many desktop and embedded operating systems without rewriting the source code.
New version of Qt features QML, an advanced new declarative programming language, and significant performance improvements.
September 21, 2010 – Nokia today released Qt 4.7, the latest version of the cross-platform application and UI framework. It is available for download now for all of Qt’s supported platforms, with upgrades for Nokia and customer solutions expected over the coming months.