Open Source C# Chat Software for Windows

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.

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

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.

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.

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.

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. R. Live Support is online chat software, developed in Asp.net(2.0) and XML. Easy to use and it facilitates 1-o-1 live communication between customers and executives. Flexible live chat software that provides the customer support with a click.

This is a c# IP socketed chat program utilizing the .net Framework. Server can hold 100 people. Created for a final project in Software Engineering TRACE College by Brandon Collins

Chateau: Chateau is an Open Source Chat client made in C#, using sockets. Chateau is encrypted with RSA encryption.

This is an IRC dice bot. This bot supports crypto-seeded random rolls of multi-sided dice. This bot logs onto an IRC server and awaits input by players. DiceBot includes support for roll multipliers (5d20) and roll modifiers (1d20 + 1d1547 - 5 * 2 / 4).

Mossawir Network Messenger is a simple, easy to use LAN messaging and chat application that allows messages to be sent between users on a network peer-to-peer with no need for a server.

#aim (pronounced "shame") is a multi-protocol instant messaging client written in C#

.IRC (or dotIRC) is an IRC client written in C#. Its goal is to provide an easy to use IRC client that will be eventually be compatible with Microsoft's System.Windows.Forms library under .NET and GTK# under Mono. It is using the SmartIrc4net library.

.nIRC is an IRC client written in C#. It has full support for text formatting, file sending, etc, and allows the use of IronPython scripts in order to make further customisation easier.

JavaScript Chat based on DOM and AJAX technologies. Content refreshing without roundtrip of page.

Aeru IRC is IRC Client for the .NET Framework. It made with C# programming language and features a full Graphical Interface. Aeru IRC uses XML to store servers and channels and app settings. The GUI uses the power of .NET.

A simple an easy to use Instant Messenger application to use on networked computers. Minimal to no setup required.

BF2AutoLoader (BF2AL) is a free, no ad/spyware, GameSpy/ASE/XFire servers browser alternative for Battlefield 2.

Direct Connect client written in C# and .Net 2.0 managed code.

Blitz Messenger... a cross-platform/cross-browser/no-downloads-required application allowing an end-user to chat via their browser. Alls required on server side is Blitz and alls required on the Browser end is Javascript and a person willing to chat!

IRC Services for the Unreal IRC server, written in C#, with a Microsoft SQL Server backend. Files are stored in XML. Services include NickServ, ChanServ, MemoServ, BotServ, HostServ, and OperServ.

This project hosts the Chat4LanServerLess protocol and its .NET client. This protocol enables user to chat on a Lan without any server. Secure function are to be implemented soon.

CmtFramework is a project designed to aid cmt members(and everyone who uses it) in common task(e.g. conferencing, file sharing, gaming...) via a plugin architecture that allows everyone to write plugin in an easy and fast way