HexChat - HexChat is a fork of XChat with bug fixes and new features.
RingCentral - RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies
irssi - Irssi is a terminal based IRC client for UNIX systems.
Dialpad - Switch is a cloud-based phone system built for Google Apps users.
mIRC - mIRC: Internet Relay Chat client
Aircall - Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs