Just like Whatsapp but from your Mac's desktop
Add fun Snapchat filters to your Mac camera
End-to-end encrypted communication
Unofficial desktop client for Facebook chat
iOS's iMessage now also on Mac OS
A traditional chat with group videoconferencing
A Multiprotocol Instant Messenger client
Share files and chat with friends safely
Chat with your Yahoo and MSN Messenger contacts
AOL's instant messaging program
Open Source alternative to chat with MSN contacts
A single program for all your IM accounts
Chat with friends on this multiplatform messaging client
Multiplatform IM client
An IM combo born of Mozilla and Pidgin
Talk to all of your MSN contact even with your Mac
Cooperative whiteboard and voice communication through Jabber
Add a bunch of improvements to iChat
A simple Jabber-based IM client