DC++ - DC++ developed by Jacek Sieka.
eMule - eMule is a free peer-to-peer file sharing application for Microsoft Windows.
EiskaltDC++ - EiskaltDC++ is a program for UNIX-like systems that uses the Direct Connect and ADC protocol.
Kazaa - Kazaa is another peer-to-peer file sharing platform, use FastTrack protocol licensed by Joltid Ltd and operated as Kazaa by Sharman Network.
LinuxDC++ - LinuxDC++ is a port of https://alternativeto.net/software/dc/ direct connect client to Linux.
eDonkey2000 - eDonkey2000 (also known as ed2k) is a free peer-to-peer file sharing software introduced in 2006 by US company MetaMachine.