RingCentral - RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies
Stack Overflow - Community-based Q&A part of the Stack Exchange platform.
Dialpad - Switch is a cloud-based phone system built for Google Apps users.
The Answer Bank - The Answer Bank is the UK’s leading question-and-answer site.
Aircall - Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs
Askalot - Askalot is a next generation CQA (Community Question and Answer) system.