The cult-favourite eMail client formerly known as Qualcomm Eudora
BrowserBD is a Java based portable browser app for web browsing/IM
A smaller, faster, and easier IM client
Experimental implementation of high performance interactable views
Internal communication software for business
Create chat bots for Facebook Messenger, Slack, Amazon Alexa, etc.
This Program Contains Many Useful Network Tools
Community-driven python bot that aims to be as simple as possible
Facebook messenger for PC Light
A small, reliable, local network messenger that doesn't need internet
Telegram Messenger
Instant Messenger Application
A small (ish) messaging server for anything you can think of
Advanced Instant Office Messenger Software by CDMesseger
GTK+ port of EZ Intranet Messenger
A multi-protocol instant messaging app for Mac OS X
decentral messaging system for Android within LAN