RingCentral - RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies
IRCCloud - IRCCloud is a modern IRC client that keeps you connected, with none of the baggage. Stay synced and notified wherever you are with our web and mobile apps.
Dialpad - Switch is a cloud-based phone system built for Google Apps users.
irssi - Irssi is a terminal based IRC client for UNIX systems.
Aircall - Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs
mIRC - mIRC: Internet Relay Chat client