toolani - Cheap international calls
TextNow - TextNow is a mobile virtual network operator (MVNO) that provides a free phone service to users by using other cellular networks coverage.
KeepCalling - Best Rates for International Calls. No Contract, Expiry, or PIN. Use Any Phone, Smartphone or PC.
Talk360 - Talk360 is a best-in-class communication utility that offers a convenient way to connect with loved ones globally.
mytello - Cheap international calls via local dial in number at very attractive prices.
TextMe - TextMe is a free calls and messaging application at both local and international levels.