VoIP.ms - VoIP.ms is a VoIP origination and termination tool.
BVoIP - BVoIP allows to easily add Cloud & On-Premise VoIP PBX to the product offering without having to re-invent the wheel or add another layer to the daily operations..
Google Voice - Google Voice gives you one number for all your phones, voicemail organized in an email format, free...
GoTo Connect - Jive PBX is a communication solution that offers remote communication services to companies such as video conferencing, text, and chat services.
NUACOM - All-in-One VoIP Business Phone System with 100+ features and integrations that will boost your sales and improve customer services. Discover the power of VoIP for seamless and cost-effective communication & Boost productivity and drive revenue.
Dialpad - Switch is a cloud-based phone system built for Google Apps users.