If you are looking to download and study existing implementations, several free and open-source options are widely cited:
: Papers detail the use of TCP for reliable, two-way messaging and UDP for lightweight broadcasting or client discovery. Popular Free LAN Chat Software LAN Chat Software Free Download
For deeper academic study or project documentation, the following resources provide technical breakdowns: Softros LAN Messenger - Download and install on Windows If you are looking to download and study
LAN (Local Area Network) chat software enables real-time communication within a closed network, often without requiring a server or an internet connection. These applications are frequently the subject of academic papers and project reports due to their use of and TCP/IP protocols to manage peer-to-peer or client-server interactions. Core Concepts in LAN Chat Papers LAN Chat Software Free Download