Valknut is a program that 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 Kuester <mathen at users dot berlios dot de >
and is licensed under the GNU GPL. It is written in C++ and uses the
cross-platform Qt (TM) library for its GUI. Valknut compiles and runs on
Linux, FreeBSD, MacOSX 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. Most occurences of
the old names have been replaced, but in some places, such as where it would
cause too much disruption, the name hasn't been changed.