Chat & IM

Use your webcam with many applications simultaneously. Use Skype, MSN, Ustream, and many other webcam and audio applications at the same time. You can also do the same with virtual audio sound driver

LINE allows you to share photos, videos, voice messages, contacts and your location information easily with your friends. LINE is one of the only services in which users can interact with fellow Mac

Free Mac online collaboration app

A Quick Look at Facebook Desktop

Real Time Conference and chat - ICQ

Camfrog Video Chat - A Great Way to Stay Connected

Free, privacy-focused messenger

IP Messenger - How to Hide Your IP Address From the Internet

Configuring the Mac OS X Zoiper Installation

Does IMVU Really Work on Mac OS X?