KeepCalling - Best Rates for International Calls. No Contract, Expiry, or PIN. Use Any Phone, Smartphone or PC.
CloudTalk - Work locally, grow globally
Amivox - Would you like to make international calls either free or at local rates ?
Skype - Stay in touch with your family and friends for free on Skype. Download Skype today to chat and call on desktop and mobile.
letsBrik - A Skype Alternative that is entirely web browser based.
Aircall - Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs