DC++ - DC++ developed by Jacek Sieka.
EiskaltDC++ - EiskaltDC++ is a program for UNIX-like systems that uses the Direct Connect and ADC protocol.
ApexDC++ - ApexDC.net is the home of an innovative P2P program using the Direct Connect and ADC networks.
FlylinkDC++ - Official FlylinkDC++ Team Page
LinuxDC++ - LinuxDC++ is a port of https://alternativeto.net/software/dc/ direct connect client to Linux.
BitTorrent - BitTorrent is a peer-to-peer program developed by Bram Cohen and BitTorrent, Inc.