Squiggle

Squiggle is a free server-less peer to peer LAN messenger. Just download and run it and you're ready to talk to everyone on your LAN.

Free Open Source Windows

4 Like

qchat

QChat is a simple crossplatform LAN chat. It is written using Qt4 so you can compile it on any platform supported by Qt.

• Discontinued official web site appears to have not been updated since 2008.

Free Open Source Mac Windows Linux

Winpopup LAN Messenger

Winpopup LAN Messenger is a cost-effective Office, Corporate, Enterprise Instant Messaging solution.

Free Personal Windows

6 Like

IP Messenger

Very simple, lightweight, and compact size IP based messenger which used by almost all Japanese companies and its affiliates. IP Messenger is one of the awesome tool...

Free Windows Android

8 Like

BORGChat

BORGChat is a LAN messaging software program. It has achieved a relative state of popularity and it is considered to be a complete LAN chat program.

Free Windows

7 Like

Bopup IM Suite

Organize secure messaging system and communicate instantly via self-hosted IM server.

Commercial $ $ $ Windows Android

4 Like

Simple Chat

Simple Chat is a simple, opensource and powerful cross-platform client-server chat for local networks and the Internet. Features Open-source software Simple...

• Discontinued Last version, 2.3.3, was released on 31 August 2014. It can be still downloaded from the official website.

Free Open Source Mac Windows Linux

3 Like

jMessenger

An open-source java based chat and file-transfer application

Free Mac Windows Linux

Vypress Chat

Vypress Chat is a user-friendly application for real-time chatting in small office or home office (SOHO) local networks. This unique chat software features an...

Commercial Windows Linux

2 Like

IBM Sametime

IBM Sametime instant messaging products integrate real-time social communications into your business environment, providing a unified user experience through instant...

Commercial Mac Windows Linux Android iPhone ... Android Tablet iPad

2 Like

Smarsh Instant Messenger

smarshIM Mobile is a free application download that requires a paid account on the smarshIM service to operate. smarshIM is a turnkey corporate instant messaging and...

Commercial iPhone

1 Like

IntraMessenger

Create your own Instant Messenger communities! Uniquely designed and fully centralized under your (admin) control. Server (open source PHP/MySQL) provides great...

Free Open Source Windows Linux

1 Like

Network Assistant

Network Assistant is a multiple-mode user-friendly network communication utility, including real-time chat, shared whiteboard, message board and instant messaging. It is...

Commercial Windows

3 Like

Output Messenger

Private and Secure Instant Messenger for Office designed specifically for keeping remote employees and multiple offices in sync. "Give your team the freedom to...

Commercial Mac Windows Linux Android iPhone ... Self-Hosted

9 Like

BigAnt Office LAN Messenger

BigAnt Office LAN Messenger offers rich features for secure and stable business communication. Including instant messaging, group discussion, remote desktop sharing...

Commercial Windows

7 Like