This month Nokia release the Maemo 5 operating system packing Nokia N900, which uses the GTK+ graphical toolkit for the Nokia N900’s application development framework; however, back in July Nokia stated that furture versions of Maemo will use Qt rather and GTK+ reports zdnetasia.
Nokia acquired Qt when purchasing the developer company Trolltech in 2008, and has now announced an official Qt port for the Maemo 5 OS. Qt is used to create the UI for programs running on Mac OS, Windows Mobile, Linux and Windows and Nokia is working on a Symbian port for the graphical toolkit.
The Maemo development community were already working on an unofficial port of Qt to Maemo which has now been merged with the official port.