Qt Development Frameworks is an Oslo, Norway-based software company best known for its Qt toolkit and application framework. Qt Development Frameworks is a wholly owned subsidiary of Nokia Corporation. Nokia sold the commercial licensing business of Qt to Digia PLC on March 2011. The company provides software development platforms and frameworks, as well as expert consulting services. Its flagship product is Qt, a multi-platform Graphical User Interface framework written in C++. Qt is popular with application developers using C++ but is supported by bindings for other programming languages... too, such as Python. Qt also includes packages such as data structures and a networking library. The popular, Free, and cross-platform KDE desktop environment and software compilation uses Trolltech's Qt library. The company also employs several KDE developers. In 2001 Trolltech introduced Qtopia which is based on Qt. Qtopia is an application platform for Linux-based devices such as mobile phones, portable media players, and home media.
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