CallHippo - Easy to use Phone System with World-Class Support
Call2friends - High-quality cheap and free international calls online to any mobile or landline numbers from internet and free calling app - cheaper than other VoiP providers. Try it now!
Callmama - Get cheap international calling, international virtual number, Call Mama Gives an added advantage to send message and make calls to non-user of Callmama App.
Make Free Calls Online - Make Free Calls Online is a web application that, as the name suggests, allows its users to make international and local calls for free.
KrispCall - Virtual cloud phone system for business
Poptox - Poptox is a web application where you can communicate with people in every corner of the world.