Open Source C# Chat Software

See https://pidgin.im/about/ for more information. Pidgin is an instant messaging program which lets you log in to accounts on multiple chat networks simultaneously. It runs on Windows, Linux, and other UNIX operating systems. Pidgin is compatible with the following chat networks out of the box: AIM, ICQ, Google Talk, Jabber/XMPP, MSN Messenger, Yahoo!, Bonjour, Gadu-Gadu, IRC, MXit, Novell GroupWise Messenger, Lotus Sametime, SILC, SIMPLE, MySpaceIM, and Zephyr. It is written in C and makes heavy use of GLib and GTK+. Finch is a command line instant messaging program. It also lets you log in to accounts on multiple chat network simultaneously, and it is compatible with the same chat networks as Pidgin. It is written in C and makes heavy use of GLib and ncurses.

DiscordChatExporter is a cross-platform utility that allows users to export Discord chat histories into structured files for archival, analysis, or backup purposes. The tool connects to Discord accounts and retrieves message history from servers, channels, or direct messages, then converts the data into formats such as HTML or JSON. It is designed to preserve message structure, timestamps, attachments, and formatting so exported conversations remain easy to navigate and review. The project is widely used for moderation audits, research, community archiving, and personal record keeping. With both command-line and GUI usage patterns available through the ecosystem, it supports automation as well as manual workflows. Overall, DiscordChatExporter provides a reliable way to extract and preserve Discord communications outside the platform.

RevokeMsgPatcher is a reverse engineering patch tool for Chinese messaging apps QQ and TIM. It prevents message recall (revocation) by modifying the app’s behavior to retain recalled messages, allowing users to see messages that would otherwise be deleted. Primarily used in Windows environments, the tool is popular among users who prefer transparency in their chats.

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!

DC# is an enhanced DirectConnect client written in C# for .NET platforms. Planned features include improved interface and searching capabilities, idle-triggered upload bursts, multi-source downloads, and auto search for alternates.

ZIM is a highly extensible C# instant messaging platform aimed at the small business looking to enhance communication amongst co-workers to increase productivity.

Windows 11/10 taskbar area application that allows toggle of any desktop window "Always On Top" state. For example keep Messenger always on top of other windows or any other application that you'd like to always have visible.

Dunbar is a location-based chat tool for mobile devices and phones as well as desktop computers. The architecture is built on web services so that clients on any operating system can be created. The service will be free to users, and the source code will

NOTE! xg moved to github, no mor updates are published to sourceforge! see you @ http://github.com/lformella/xdcc-grabscher

ThinLisp is a practical dialect of lisp for real world applications. You develop in Common Lisp, you deploy in C. ThinLisp programs are as fast as C, by design. Used for a decade in million line systems.

RageIRCd has been specifically developed with stability and security in mind. It has a wide range of useful features, while operating at maximum performance. RageIRCd v2.0 now supports Microsoft Windows.

This project is an open source hub software (server for Direct Connect) coded in C#, more powerful, requiring less resources and supporting a <a href=/projects/odchplugins/>plugin</a> architecture.

THIS LIBRARY IS NOT UNDER ACTIVE DEVELOPMENT (sorry). AIMLBot (Program#) is a small, fast, standards-compliant yet easily customizable .NET dll implementation of an AIML (Artificial Intelligence Markup Language) based chatter bot. AIMLBot has been tested on both Microsoft's runtime environment and Mono.

Hybrid Share is a User Friendly Mono C#/Gtk# Application that allow Mac, Windows and Linux Users To Share Files. The Application is extensible via Plugins, so you can Talk with connected people, check your mailbox or other things that plugins could do.

OfficeSIP Softphone and Messenger are two enterprise VoIP SIP clients written in C# in .NET Framework. The SIP clients make use of Microsoft UCC API SDK, ensuring the highest quality of audio and video. Compatible with Office Communications Server. See also open source, cross-platform: 1) simple messenger Brief Msg at http://briefmsg.org 2) MUVConf is a multi-user video conferencing, see demo video http://youtu.be/YrBU-Aqtvrk, download https://code.google.com/p/muvconf/downloads/list

Driver support for 3D Controller Hardware. We hope to support SDL Input, DirectInput, and other major controller API's including game consoles and embedded systems.

Thresher is a .Net IRC client library designed to serve as the basis for IRC bots and GUI clients. It is written in C# but can be used by any .Net supported language. Thesher also works with Mono on Linux.

IIM is an Instant Messaging Solution for corporate environments where IM programs like AIM and MSN have been banned. It is not firewall aware and only works within a switched network so it is not vulnerable to external attack. Uses .Net Framework 1.1

A Jabber client written in C# using the .NET Compact Framework for use on Windows PCs and Windows Mobile PDAs. It is intended primarily to be deployed in a corporate environment where restricting the actions of users is desired.

Application for automatic mood changing in Skype

Orkut Alert is a tiny application that runs in the background checking for any new scraps that have arrived in your scrapbook.It reqires you to have a working account at Orkut .

This is a funcional application for Windows for your Telegram Bot. To create your own bot you must register new bot by BotFather bot in Telegram. BotFather will give you unique Autch code that will be used in this application.

YTalk Cursor Freedom (YCF) is a small C# app that you can run inside of YTalk which provides an extended feature set for YTalk such as the ability to use the arrow keys.

nebohodimo IM is a Jabber client for Windows Mobile devices. It's written to be stable over unreliable mobile connection and easy to use.

A C#.Net IRCd that uses the TOR network in a distributed manner, connecting any IRC client via the TOR network to other TOR-IRCd instances. IRC clients connected to the local IRCd sees other IRC Proxyed clients.