instant messaging client
software for sending or receiving chat messages
Windows Live Messenger
deprecated instant messaging client
Profanity
text mode instant messaging interface that supports the XMPP protocol; runs on Linux, OS X and Windows using Cygwin
Briar
free peer-to-peer instant messenger
Snapchat
American photo messaging application
Messages
instant messaging software application developed by Apple
Facebook Dating
digital dating product
Gap Messenger
Iranian messenger
Mango
free and open source chat program
Prosody
XMPP server and free software
TNT
instant messenger client
Marco Polo
video messaging and video hosting service mobile app