Google Voice - Google Voice gives you one number for all your phones, voicemail organized in an email format, free...
8x8 X Series - X Series connects teams across channels and around the globe, giving you access your most critical information securely, from any location.
VoIP.ms - VoIP.ms is a VoIP origination and termination tool.
Vonage Business Communications - Vonage Business Communications transforms communications and activates conversations anytime, anywhere. Learn more about unified communications now!
Mitel - Business Communications and Collaboration
Broadvoice - Cloud PBX solution for SMBs