Burner - Disposable phone numbers -- now with MMS photo support
RingCentral - RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies
SMS-man.com - SMS-man offers a virtual numbers to receive SMS and create multiple accounts on WhatsApp, Telegram, Instagram, Twitter, Amazon and others. The SMS-man service provides numbers of such countries as China, US, India, Russia, UK, Germany, Ukraine etc.
Dialpad - Switch is a cloud-based phone system built for Google Apps users.
Hushed App - Hushed App will allow you to receive a Secondary Phone Number for Private, Long-Distance...
Aircall - Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs