Instant Messaging

Camfrog icon
A traditional chat with group videoconferencing
Messenger for Desktop icon
Unofficial desktop client for Facebook chat
Yahoo Messenger for Mac icon
Chat with your Yahoo and MSN Messenger contacts
Microsoft Messenger icon
Talk to all of your MSN contact even with your Mac
Coccinella icon
Cooperative whiteboard and voice communication through Jabber
PSI icon
A simple Jabber-based IM client
Franz icon
A single program for all your IM accounts
Nimbuzz! icon
Chat with friends on this multiplatform messaging client
Line icon
Just like Whatsapp but from your Mac's desktop
Messages icon
iOS's iMessage now also on Mac OS
Palringo icon
Multiplatform IM client