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.
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
Nextiva - Business VoIP, cloud phone systems trusted by more than 150,000 companies. Powered by the leading cloud PBX VoIP platform, Nextiva is rated the best business VoIP service provider.