Dialpad - Switch is a cloud-based phone system built for Google Apps users.
Voiptime Cloud Call Center - Cloud call center & telemarketing solution
RingCentral - RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies
EasyCall Phone Call Center - Instantly provide voice customer support through phone calls.
CallHub - Predictive Call Center, Voice and Text Broadcasting app
CloudTalk - Work locally, grow globally