KDE

KDE provides tools and documentation for developers to develop applications and projects like Calligra Suite, KDevelop, Krita, digiKam, and many others.The Plasma Desktop is the default desktop environment on Unix and many Linux distributions. KDE is written in C++ and Qt. KDE upstream has a well maintained UserBase wiki.KDE offers a full suite of user workspace applications which allow interaction with these operating systems in a modern, graphical user interface. KDE produces applications like the Konqueror web browser, Dolphin file manager and Kontact, a personal information management suite.