KouChat is a free, open-source, cross-platform, text-based chat application. It is designed to provide an easy way to chat with friends, family and colleagues over the Internet. The application is built on top of the Java Virtual Machine, allowing it to be run on many different platforms. It is lightweight, feature-rich and supports a wide range of features, such as secure SSL/TLS encryption, file transfer, multiple chat rooms, user-friendly interface, and more. KouChat also supports several popular instant messaging protocols, such as AIM, ICQ, IRC, MSN, Yahoo, and more. With KouChat, users can communicate in real-time with their contacts, no matter where they are located.
Serverless serverless intranet chat server for multiple platforms. android missing
LAN Messenger
BeeBEEP
IP Messenger
Secure Instant Messaging
Discontinued It appears that the project is no longer being developed since February 2017. The latest version, 1.2.37, released in November 2016, can still be downloaded from GitHub. It is reportedly not working on Ubuntu 18.04.