The KDE Windows Port
We are currently trying to port the KDE-applications to MS Windows. Currently we support only Windows 2000, Windows XP and Windows 2003. Vista support is underway.
The preferred way of installing KDE apps under windows is the KDE-Installer you can download from here.
Join our mailing list kde-windows@kde.org for news and announcements.
KDE on Windows is mostly in an alpha state, so not suitable for day to day use yet. If you're interested in helping to track some bugs, get some of your favourite KDE apps working correctly, you can start here. For some help join IRC channel #kde-windows on freenode.