Skype
The granddaddy of all VoIPs
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The granddaddy of all VoIPs
Multi-platform blog publisher
Chatting with friends & family near and far
Secure and Versatile Enigma Messenger Review
Chat from your Mac to any device
X (Twitter) Review: Free Social App for Mac Users
A free program for mac
Complete IM client with cute design and great features
Zoiper: VoIP Client Supporting High Quality Protocols
A free program for Mac, by TeamSpeak.
SMS and Phonebook management made easy
FoursquareX: See what your friends are up to from your desktop