gtk-gnutella - gtk-gnutella is a server/client for Gnutella.
DC++ - DC++ developed by Jacek Sieka.
LimeWire - LimeWire is a free peer-to-peer file sharing platform that is available to use on Windows, Mac OS and Solaris platforms.
ApexDC++ - ApexDC.net is the home of an innovative P2P program using the Direct Connect and ADC networks.
eMule - eMule is a free peer-to-peer file sharing application for Microsoft Windows.
LinuxDC++ - LinuxDC++ is a port of https://alternativeto.net/software/dc/ direct connect client to Linux.