Matthias Ettrich, original creator of LyX, a what-you-see-is-what-you-mean document processor for the LaTeX typesetting system. Later he got more interested in the usability of not only LaTeX but also the desktop itself and founded the KDE project. Here he was and partially still is responsible for various things including but not limited to the window manager itself. After finishing his studies in computer science he eventually got hired by Trolltech and moved to Oslo, where he now is the technically responsible lead developer for the Qt toolkit.