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.

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 No longer maintained, and has a weakness in its encryption used for linking.

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.

Miranda NG is a successor of a popular multi-protocol instant messaging client for Windows, Miranda IM. Very light on system resources and extremely fast. Supports Em-LAN Facebook, Gadu-Gadu, ICQ / MRA, IRC Internet Relay Chat, Jabber XMPP, MinecraftDynmap, Omegle, Sametime, SkypeWeb, Steam, Tox, Twitter, and VKontakte. Linux is not a natively supported operating system, but Miranda is known to run on Linux under Wine. PluginUpdater is responsible for keeping your Miranda up-to-date. It checks for updates for all installed plugins and other components like icon sets and langpack regularly (depending on its settings) and performs updating automatically.

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

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

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.

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

Rhapsody is a text console IRC client for Unix operating systems. It is small, fast, portable, easy to use and full featured. An intuitive menu-driven user interface makes rhapsody ideal for beginner to intermediate users.

Undernet Coder Committee -- ircu development

A pidgin plugin that allows user to assign global hotkeys (e.g. Ctrl+Alt+g) for togglling buddy list and reading queued message. When "Toggle List" hotkey is enabled, it makes the buddy list hidden from your taskbar and task switcher (similar to ICQ).

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.

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

muh is a smart IRC-bouncing tool that remains on IRC all the time. You can take control over your nick by connecting to muh with an IRC client that is able to supply a password for the server connection.

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.

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.

DAVIS is an easy and useful language for IRC bots. This project contains our own bots, some bots for demonstration, a parser that creates Java, C, Perl and IRC-Script code out of a DAVIS file, and an interpreter for DAVIS files.

Gamers.IRC is a full MSL Script for mIRC, the most popular Windows IRC client. Gamers.IRC is for Windows 95 and higher. Source code: Download and run the installer. Open the .grc and .ini files with notepad.

Universal IRC Daemon -- This was formerly the ircd used on Undernet, under development by Carlo Wood (Run)1993 - 2000. Undernet forked and resumed development elsewhere. This code is still more or less in the state that it was in when Carlo stopped.

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.

gruftistats is a program to read IRC logs and produce an HTML page of statistics and amusing facts about an IRC channel.

An automated IRC trivia bot. Features an advanced string matching algorithm designed to match answers phonetically.

A free Win32 instant messaging client. Smaller, Faster, Easier.