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
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A small (ish) messaging server for anything you can think of
Advanced Instant Office Messenger Software by CDMesseger
Stay in touch with all your friends on Skype, FB, G+, ICQ in one app.
SMS plugin messenger with reliable SMS gateway connection.
Free Network Messenger
IPMessenger
P2P instant messenger
Facebook Chat Desktop Messenger
small, fast, java messenger
Instant Messenger provides user with an easy way to chat with friends.