Bersirc
- Fully featured Windows IRC client with an attractive interface and powerful scripting capabilities.
- http://bersirc.free2code.net/index.php/home

IRCmmm
- IRC Client written in C# .NET. Similar look to MSN messenger.
- http://sourceforge.net/projects/ircmmm/

leafChat
- Advanced IRC client for Windows with many useful functions and features.
- http://www.leafdigital.com/software/leafchat/

TalkSoup
- A GNUstep IRC client built on the extensibility of the Objective-C language. The entire client is implemented by plugins, so one can pick and choose what they want to use.
- http://talksoup.aeruder.net/

KvIRC
- Unix based IRC client. Contains screenshots, client news, help and support, features list and miscellaneous section.
- http://www.kvirc.net

Vortec IRC
- Includes client news, support, screenshots, and contact information.
- http://www.vortecirc.com

CGI:IRC
- A Web based IRC Client written in Perl with a simple but powerful interface.
- http://cgiirc.sourceforge.net/

Ghoti
- Feature-rich, GUI based IRC client for unix, written in perl-tk.
- http://ghoti.linuxbox.co.uk

ircII EPIC4 for OpenVMS
- A port of the ircII EPIC4 Unix IRC client to the OpenVMS operating system.
- http://www.2mbit.com/~larne

HydraIRC
- Fast, feature packed and customizable, handles multiple-servers. Open Source, written in C++/WTL.
- http://www.hydrairc.com/

ERC
- An Emacs IRC client.
- http://www.emacswiki.org/cgi-bin/wiki.pl?EmacsIRCClient

WavGet
- Easy to use freeware and shareware. Home of Wavget, Sweep, ICE, and Adwizard.
- http://www.wavget.com/

IRCJunkie
- Website for IRC users. News, articles, quotes and funny logfiles.
- http://www.irc-junkie.org/

SpiffyStats
- Windows-based IRC statistics generator. Generates detailed stats based on your channel's log files.
- http://fundamentallogic.ath.cx

Real 3D Chat
- Allows you to chat in real 3D in front of functional, scrollable Webpages with avatars who talk via bubbles.
- http://www.spatialknowledge.com/projects/clara/

dIRC
- Windows IRC client. Support connections to multiple connections, numerous scripting languages, and other unique features.
- http://www.dircchat.com/

SharpIRC
- A GPL'd IRC client written in C#.
- http://sharpirc.sourceforge.net/

EPIC
- Popular ircII-based IRC client with added features.
- http://www.epicsol.org/

IRCXpro
- IRC client that works exactly like an instant messenger.
- http://www.ircxpro.com/

upIRC
- An IRC client for PalmOS.
- http://www.smittyware.com/palm/upirc/

IceChat
- Simple, Multi Server IRC Client with a unique interface.
- http://www.icechat.net

TurboIRC
- Windows IRC client with enhanced features and scripting capabilities.
- http://www.turboirc.com/

BitchX
- The most popular IRC client for UNIX. Based on ircII.
- http://www.bitchx.org/

IRCfs
- Standalone IRC file server for Linux.
- http://ircfs.sourceforge.net/

XChat
- A GTK+ X-windows client with Perl and Python scripting support.
- http://www.xchat.org/

savIRC
- An IRC Client written in the tcl/tk programming language. Both Windows and Linux compatible. Contains screenshots, news, Forum, download area and documentation.
- http://www.savirc.com/

Klient
- Windows IRC client. Uses DLLs rather than scripting to increase speed and lower processor demand.
- http://www.klient.com/

.IRC
- Full Featured Windows .NET IRC Client with built-in SSL (crypted) IRC support.
- http://www.joher.com/dotIRC/

ircII project
- The original IRC client. Contains downloads, information, and mailing lists.
- http://www.eterna.com.au/ircii/

Irssi
- Powerful text-based IRC client for UNIX with perl scripting support.
- http://irssi.org