4.5
Free
Skype
The granddaddy of all VoIPs
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Free
The granddaddy of all VoIPs
Free
Free secure messaging app
Free
Chatting with friends & family near and far
Free
Viber on your Mac Desktop
Free
Webcam software and screen recorder
Free
A free program for Mac, by Hiroaki Kikuchi.
Free
Team communication: give it some slack
Free
A safer way to chat
Free
A free chat and video app
Free
Zoiper: VoIP Client Supporting High Quality Protocols
Free
Easy web design
Free
AIM for Mac: AOL Chat Messenger for Mac