Valknut is a program the uses the Direct Connect protocol. It is compatible with other DC clients, such as the original DC from Neomodus, DC++ and derivatives. Valknut also interoperates with all common DC hub software.

Valknut is written by Mathias Kster and is licensed under the GNU GPL. It is written in C++ and uses the cross-platform Qt library for its GUI. Valknut compiles and runs on Linux, FreeBSD, Mac OS X and Windows.

Originally, Valknut was called DCGUI , which unfortunately was very similar to the name of another Linux DC client. It was then renamed to dcgui-qt to avoid confusion. However, trademark problems relating to the use of Qt in the name forced another name change, to the rather unique Valknut.

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