RingCentral - RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies
HelpNDoc - What is HelpNDoc ? Easy to use yet powerful help authoring environment which can generate various documentation formats from a single source.
Dialpad - Switch is a cloud-based phone system built for Google Apps users.
Dr.Explain - Dr.Explain software is a help file authoring tool.
Aircall - Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs
MadCap Flare - Documentation for Any Audience, Language or Format