K Desktop Environment - KDE is a powerful Open Source graphical desktop environment for Unix workstations. It combines ease of use, contemporary functionality, and outstanding graphical design with the technological superiority of the Unix operating system.
TrollTech (Qt) - Trolltech is a company that develops two different kinds of software: Multiplatform application development frameworks; and a comprehensive embedded Linux application platform for PDAs and other mobile devices. Based in Oslo, Norway (with offices in Brisbane, Australia, and Palo Alto, California), its flagship products are Qt and Qtopia.
Cygwin - a Linux-like environment for Windows. It consists of two parts: a DLL (cygwin1.dll) which acts as a Linux emulation layer providing substantial Linux API functionality and collection of tools, which provide Linux look and feel.
Cygwin/XFree86 - a port of XFree86 to the Microsoft Windows family of operating systems
XLiveCD - A CD based on Cygwin for X Windows forwarding via ssh
QKW: QT-KDE Wrapper - Compiling and running existing KDE apps under win32 as native (without X11 and Cygwin) win32 apps