Best Open Source Windows Chat Software 2025

Chat Software for Windows

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Browse free open source Chat software and projects for Windows 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

DC++

A Windows client for the Direct Connect networks

DC++ is an open source Windows client for the Direct Connect file sharing network. The DC network is a decentralized network, made up of individual servers (hubs) that users join to share files with other members on that hub. Each hub is individually run by a fellow user of the DC network, and may have certain themes to the content on the hub. Hub owners set up rules to regulate their hub as they see fit.

63 Reviews

Downloads: 1,158 This Week

Last Update: 2025-09-12
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2

Psi

Psi IM — Qt-based XMPP client

Psi is cross-platform powerful XMPP client designed for experienced users. There are builds available for MS Windows, GNU/Linux and macOS.

30 Reviews

Downloads: 379 This Week

Last Update: 2025-08-23
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3

Psi+

Psi+ Project — development branch of Psi XMPP client

Psi is a cross-platform powerful XMPP client designed for experienced users. Psi+ is a development branch of Psi XMPP client. Previously is was a sort of fork but now just consider it as a space for nightly builds.

3 Reviews

Downloads: 504 This Week

Last Update: 2025-10-27
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4

phpMyChat

Standalone chat system developed in php, mysql and javascript

phpMyChat-Plus is an easy-to-install, easy-to-use multi-room PHP/DB chat. It is currently available for MySQLi, MariaDB, PostgreSQL, and ODBC. It supports IRC-like commands, moderators, is available in 24 languages and fully compatible with php7.

32 Reviews

Downloads: 13 This Week

Last Update: 2025-02-11
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5

Yammy - Yahoo Messenger Archives Decoder

Yammy (Yahoo Messenger Archive Decoder) allows you to decode and view not only yours but, also other stored YM conversations. You don't even need a password!

Downloads: 10 This Week

Last Update: 2012-10-15
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6

WebAPP CMS V 1.0 SE

WebAPP: Web Automated Perl Portal is easily installed on virtually any UNIX-based server which is provided by all modern hosting plans. WebAPP is the most fully-featured, versatile, free and open-source, flat-file Perl portal script available today! ----

Downloads: 0 This Week

Last Update: 2014-05-11
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