Blitzed Open Proxy Monitor
- BOPM is an open-source open proxy monitor which works with the Hybrid, Bahamut, Xnet, Unreal and Dancer IRCDs.
- http://wiki.blitzed.org/BOPM

IRCD
- Release notes, free download, documentation and FAQ for the (now historical) original Internet Relay Chat Daemon.
- http://www.nic.funet.fi/~irc/server/

Beware ircd
- A small (less than 200 KB) IRC server for Windows that is able to handle large numbers of users.
- http://ircd.bircd.org/

The Inspire IRC Daemon
- InspIRCd is a C++ IRC Daemon for Linux and BSD systems. The system is modular and scalable and includes a module API.
- http://www.inspircd.org

FWS IRCd
- Windows IRC server with a reasonable amount of configuration/tweaking options. It also has VBScript support, a built-in HTTP server (IRCd information), IRC Services, DNS server, client graph program, many IRC tools and some IRC clients.
- http://ircd.fwsnet.net

TR-IRCd
- An IRCd that combines the comfort of bahamut with the reliability of hybrid, adding user security related features.
- http://tr-ircd.sourceforge.net/

The DarkFire IRC Daemon
- The server software used on the DarkFire IRC Network. An robust IRCd based on Dreamforge with enhancements and years worth of changes.
- http://ircd.darkfire.net

IRC Defender
- IRC Defender is a fully modular perl program which helps with securing a medium to large network against abusive users, bot attacks, and ban evasion, amongst other things.
- http://ircdefender.sourceforge.net

asuka
- Development page of the IRCd used by QuakeNet.
- http://dev.quakenet.org/

IgnitionServer
- An open source/free RFC1459 compliant IRCX server for Windows with services (NickServ, ChanServ, etc.) and remote administration.
- http://www.ignition-project.com/

DALnet - Bahamut
- Bahamut is an Internet Relay Chat Daemon (IRCd) designed for DALnet, one of the major IRC networks in the world.
- http://bahamut.dal.net/

Faerion
- An open source multi platform IRC server developed with respect to internationalization and portability.
- http://faerion.sourceforge.net

UltimateIRCd
- IRCd based on dalnet DreamForge IRCd.
- http://www.shadow-realm.org/

Undernet IRCD
- The Undernet IRCD server.
- http://coder-com.undernet.org

DICE
- A multi-protocol hybrid server that offers simultaneous connectivity from IRC-, opennap-, and HTTP clients (WWW browsers).
- http://exe.adam.ne.jp/dice/index.html

IRCD-Hybrid
- The IRC server software used on networks like EFnet, one of the original irc servers.
- http://ircd-hybrid.com

IRCXpro
- IRC server for Windows. Free trial version, FAQ, manual, reviews, example sessions. Also offers messenger client.
- http://www.ircxpro.com/

Global IRC-d
- IRC server for MacOS. Compatible with most clients on all platforms. News, shareware download, FAQ and help pages, mailing list.
- http://www.globalircd.com/

UnrealIRCd
- One of the most feature-packed IRC servers in the world.
- http://www.unrealircd.com

DALnet IRCD
- The DALnet FTP archive. More than just IRCDs.
- ftp://ftp.dal.net/pub/dalnet/server/

Windows IRC servers
- Several (outdated) IRCDs compiled for the Windows Platform.
- http://www.storer.net/ircd.html

The Perl IRC Daemon
- News, view CVS tree, mailing lists, readme file, and source downloads.
- http://pircd.sourceforge.net/

Old IRC Depository at cs-pub.bu.edu
- Out of date distribution site; for historical purposes only.
- ftp://cs-pub.bu.edu/pub/irc/servers/

ChatSpace
- Commercial chat server for small to mid-size businesses.
- http://www.chatspace.com/

ConferenceRoom
- Popular commercial IRC server for Windows.
- http://www.webmaster.com/