DC++ - DC++ developed by Jacek Sieka.
RingCentral - RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies
EiskaltDC++ - EiskaltDC++ is a program for UNIX-like systems that uses the Direct Connect and ADC protocol.
Dialpad - Switch is a cloud-based phone system built for Google Apps users.
ApexDC++ - ApexDC.net is the home of an innovative P2P program using the Direct Connect and ADC networks.
Aircall - Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs