LinuxDC++ is a Linux port of the Direct Connect client DC++.  Though it is
primarily aimed at Linux, it has been shown to work on other Unix-based
operating systems as well.  It is written in C++ and makes use of GTK+ for
the user interface.  LinuxDC++ is free and open source software licensed
under the GPL.

Direct Connect is a peer-to-peer file-sharing protocol.  The most popular
Windows client implementing this protocol currently is DC++.  Direct Connect
clients connect to a central hub where they can view a list of clients or
users connected to them.  Users can search for files and download them from
other clients, as well as chat with other users.