Best Open Source Chat Software 2026

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Browse free open source Chat software and projects below. Use the toggles on the left to filter open source Chat software by OS, license, language, programming language, and project status.

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1

Eggdrop

Eggdrop is the most advanced IRC robot available. It has been under development since December 1993, and unlike most other bots, it is still regularly updated.

Downloads: 2 This Week

Last Update: 2013-04-15
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2

eggheads

Eggdrop is the most advanced IRC robot available. It has been under development since December 1993, and unlike most other bots, it is still regularly updated.

Downloads: 1 This Week

Last Update: 2013-04-15
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3

BO Web Service - WebForum

This web service developped in Java provides WebForum services on the IMAP4/POP3 protocol : you don't need database, and common messaging tool like Netscape Messenger or Outlook permits to create/delete new forum and to moderate messages.

Downloads: 0 This Week

Last Update: 2013-02-22
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4

Miaou Messenger

Miaou Messenger is a client/server chat library, which can be included in all your .NET applications which need a communication system.

Downloads: 0 This Week

Last Update: 2013-03-27
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5

Open Collaborative Documents Editor

OCDE (Open Collaborative Documents Editor) is a spreadsheet and rich-text editor, which allows to edit documents with other people. It is developed in XUL and based on XMPP (Jabber) to synchronise documents between different computers.

Downloads: 0 This Week

Last Update: 2015-12-03
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6

Open Descent Foundation

The Open Descent Foundation (ODF) is a community for developers, who want to help to create open source programs, tools, etc. for the famous games Descent1, -2 or -3. Everyone can join the ODF if he accepts the idea of writing open source programs.

1 Review

Downloads: 0 This Week

Last Update: 2013-04-29
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7

Rakurai

This project will revolutionize client to server program communications. Open source versions of anything we release, will be available here.

Downloads: 0 This Week

Last Update: 2013-02-25
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8

microJabber

Jabber client libraries for light java devices such as mobile phones, it brings instant messaging capabilities to every java phone (with support to MIDP), but may be used for other applications! It uses a very tiny XML parser crafted for this project.

Downloads: 0 This Week

Last Update: 2013-04-08
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9

phpMyBot

phpMyBot is an IRC Bot API developed in PHP.

Downloads: 0 This Week

Last Update: 2013-02-27
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