Open Source C IRC Clients

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.

Miranda IM is an open source, multi-protocol instant messaging client designed to be very light on system resources, extremely fast and customizable. A powerful plugin-based architecture make Miranda IM one of the most flexible clients on the planet.

BitchX is an IRC client based on ircII/EPIC4. It includes many features that are usually relegated to scripts such as CDCC and flood protection -- you can just start it and go. Development was on hiatus for a while but is now resuming.

Ghost is an open source irc bot project. It is loosely based off of eggdrop 1.4. Created by Einride and Ievil. No longer maintained, and has a weakness in its encryption used for linking.

A graphical notification plugin for the instant message client gaim. Now hosted at http://plugins.guifications.org/trac

srvx IRC Services is a ground-up implementation of services for IRC networks (supporting IRCu2.10, Bahamut, and other IRC server dialects). Features include POSIX threading, generalized proxy detection and all the standard services users expect.

IRCD-Hybrid is a lightweight, high-performance Internet Relay Chat server.

Anope Services are built off of the original Epona code written by Lara which is built off of IRC Services. These services have advanced the original Epona code and include new features such as Modules, Mysql, and Defcon Mode.

X-Chat Aqua is X-Chat with an Aqua interface for MacOS X. X-Chat Aqua uses the irc engine from X-Chat, and is designed to look and feel like the GTK+ front end.

libircclient is a small but powerful library, which implements client-server IRC protocol. It has all features needed to create your own IRC client or bot, including multi-threading support, sync and async interfaces, CTCP/DCC support, colors, SSL connections and so on.

X-Chat is an IRC (Internet Relay Chat) program for Linux and Windows.

Undernet Coder Committee -- ircu development

Fire is a multi-protocol instant messenger client for Mac OS X based on freely available libraries for each service. Currently Fire handles AOL Instant Messenger®, ICQ®, MSN® Messenger, Jabber, limited IRC, Yahoo!®, and Apple Bonjour communications.

Bot Sentry is a Pidgin (libpurple) plugin to prevent Instant Message (IM) spam. It allows you to ignore IMs unless the sender is in your Buddy List, the sender is in your Allow List, or the sender correctly answers a question you have predefined.

Scripts and hub mods written to enhance OpenDCHub. The Hub-Security script filters unregistered users by country, and adds op commands and security features. Statistical and fun scripts are also available. Future development will shift towards ODCH mods

Features include: authentication, channel control, a full-featured Memo system, a Seen system, logging capabilities, a help system, the ability to act as a file sharing node and the ability to share data and perform functions together with other bots.

Eggdrop is the most advanced IRC robot available. It has been under development since December 1993, and unlike most other bots, it is still regularly updated.

Windows (XP/Vista/7/8/10) ports of the Eggdrop IRC bot

Solid IRCd is an Internet Relay Chat Daemond based on bahamut IRCd developed by the bahamut team. Our main goal is to provide users with a stable server, and at the same time, a more secure server, while having all the features of bahamut and more.

LiquidIRCd is based of Bahamut-1.4.35 with powerfull features like crypted Hostmasking (CRC and MD5), SSL, new Channelmodes like HalfOP, Founder, Protect and many more.

Rhino is a fast, light weight and high performance ircd. A system administrator can install this package on a unix like system and configure the server with easy clean configuration files.

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.

PChat has moved to googlecode http://pchat-irc.googlecode.com

aircbot becomes Another IRC Bot since it now supports run-time loadable modules, all compiled, so it's much faster then eggdrops.

*Unofficial* patch for DALnet's ircd, currently for version 1.4.36. Provides complete IPv6 and IPv4-in-IPv6 support and SSL support.