Components of KDE are largely licensed under the LGPL, and many of them represent libraries written in C++. It uses the popular Qt graphics library. Where the competing GNOME project tries to be fairly language-neutral, with library bindings available in many languages KDE is largely biased towards C++.
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.