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.

HunterPie is a modern overlay application for Monster Hunter games that gives players real-time information during hunts. It was rewritten from scratch for its v2 generation while keeping the same focus on a clean, powerful, and easy-to-use experience. The overlay can show hunting data through modules, plugins, widgets, and customizable interface elements. It is useful for players who want clearer visibility into damage, monster data, party performance, and other hunt-related context. The project is built as a desktop application and requires the .NET Desktop Runtime. HunterPie is best understood as an extensible companion tool for Monster Hunter players who want more feedback and personalization than the base game interface provides.

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.

SimpleIrc is a simple & complete implementation of the Irc protocol. SimpleIrc is written in C#, for the .NET environment. It is mainly intended for 3rd party developers so they can create their own Irc clients, in an easy and fast way.

IrcLeech is an application which allows users to easily download files offered by XDCC bots on IRC servers without having to type commands or even know anything about IRC and XDCC. IrcLeech will automatically resume any download that was interrupted.

Download files of the Telegram channels or groups you are a member of.

A fork of pidgin which aims to provide minor features that have not been addressed by the pidgin development team (including manual textbox resizing). See funpidgin.sf.net for details.

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.

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!

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

AIML Verbot Converter - Converts AIML files to Verbot KnowledgeBase (VKB) files. Visit http://www.verbots.com/ and http://www.alicebot.org to learn more about AIML and Verbots. Implemented in C# (.NET).

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.

MonoBot is a new IRC Bot written Csharp Mono/.Net, for linux and windows OS.

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.

A Voip GUI write in C#, based in Tapioca-Voip framework, 100% compatible with Gtalk.

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.

GibPhone is a highly extensible VoIP/IM client for the .NET framework that uses a powerful plugin engine to allow for UI extensions and any call control stack / media payload / transport protocol combination.

This project is a construct that allows you to create an easy and robust implementation of a chat server/client model based on C# remoting. It also includes a client and server to use as is.

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.

A C#.Net IRCd that uses the Gnutella 2 network in a distributed manner, connecting any IRC client via the gnutella network to other Zanzi IRCd instances. IRC clients connected to the local IRCd sees other G2 Proxyed clients as anonymous. Download and enj

A fully-featured server designed to interact with third-party services and provide its own services, as well as a client designed to interact with that server.

KaosIRCd is an advanced IRCd, with SSL & Hostmasking. Lookup KrypticIRCd project page for download and newest version information.

An open source .NET library that aims to provide a complete client-side implementation of the MSN messaging service, using the latest protocol (MSNP15). A fully-featured GUI client, Angel Messenger, is being developed along-side the library.

Professional IRC client for everyone. If you find someone error in the client can be report here: https://www.facebook.com/nexusnetwork.pw or here https://twitter.com/_Nexusnetwork_ If you have an idea what to do should plugin then to the above of addresses you can write. ---------------------------------------------------------------- Professzionális IRC kliens mindenki számára. Ha talál valaki hibát a kliensben akkor itt lehet jelenteni: https://www.facebook.com/nexusnetwork.pw vagy itt https://twitter.com/_Nexusnetwork_ Ha van ötleted milyen bővítményt kellene csinálni akkor a fenti címeken lehet írni. (Magyar nyelvet akkor lehet kiválasztani,ha első indítás után újra indítod a klienst. Megjegyzés: magyar nyelv még nem teljes)