Mumble is an open-source, low-latency, high quality voice chat
Android Matrix messenger application using the Matrix Rust SDK
(Golang) Go bindings for Discord
You can message and share files inside your intranet without a server.
Gangio is a full-featured chat and communication platform.
HD Audio & Video Calls, AI chatbot widget, Widget, Lifetime License
Desktop communication tool: chat, telephony, multimedia
Make LAN transfers easy, no server needed
The Free & Popular FLARUM Web Software in a Complete Virtual Machine
The very last word in instant messaging
Low-latency, high quality voice chat for gamers
WebRTC complete web based Party Line Voice Chat Script
This Program Contains Many Useful Network Tools
A small (ish) messaging server for anything you can think of
The IRC's Talking Robot
A Java RMI base messenger which works on LAN
An intranet chat application that does not require a server.
Mossawir Lan Messenge 3, Sever less Peer 2 Peer Lan messenger
Chat inside a LAN (subnet).
FTalk is a java Desktop beautiful GUI Lan Chat Application.
Local chat based on MSSqlServer