Open Source C# Chat Software for BSD

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.

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.

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.

This is a set of .NET class libraries, designed to use various Internet protocols in a easy-to-use OO matter. So far it contains a POP3 and an IRC (Internet Relay Chat) 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.

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.

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!

BoB is an IRC bot written in c# for the .net framework. It provides the basic requirements for maintaining an IRC connection and the associated data. The functionality can be extended via plugins written in any .net enabled language.

Chalks is a software under development for crossplatform realtime concurrent text editing. The primary focus will be ease of use and minimum requirements.

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.

Chipz.IRC is an easy to use IRC library with SSL support. It's written in C# for the .NET framework.

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

Code Connector is a program that gives developers the ability to collaborate via the internet in a highly productive and efficient way. It provides centralized project and file management, multi-user collaborative text editing, and communication tools.

An IRCX Server developed upon the .NET technologies, written in C# and VB.NET. Plans include full range of services and full network development support as well as a plugin architecture for easy expansion of the server.

Csb - A modular IRC bot in C#

Demon is a free, open source dAmn emulator that more efficiently runs on the deviantART chat protocol. Multi-threading/queuing is strategically used for performance and reduction of lag.

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.

This project aims to create a chat application similar to IRC clients that utilizes a Peer to Peer network with inbuilt anonymity and public key encryption and signing.

Flex Chat is an Open Source IRC client, which is written in C#. It is comfortable, easy to use and configure client, which is supporting VB, Perl, PHP, Tcl, C#, C++ scripts and XML database.

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.

GGCsLib - Small and easy to use library for Gadu-Gadu IM, written in C# under .NET (mono).

Galaxium is an multi-session, multi-protocol instant messenger application build for GNOME users. It uses the GTK# and GDI+ libraries as well as the Mono Framework.

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.

It's just another Instant Messenger based on jabber

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.