Nokia to buy Trolltech, the Norwegian company behind the Qt C++ user interface library (as used in Linux desktop KDE and numerous multi-platform applications including Google Earth and the Last.fm client) and the Qtopia mobile user interface platform. Nokia has pledged to continue the development of Trolltech's software and its commitment to open source, and this step could give it more of a foothold in the Linux mobile phone market. The future for Nokia's own Maemo toolkit (based on Linux and rival user interface library GTK) looks less certain.