.IRC: Full Featured Windows .NET IRC Client with built-in SSL (crypted) IRC support.
Bersirc: Fully featured Windows IRC client with an attractive interface and powerful scripting capabilities.
BitchX: The most popular IRC client for UNIX. Based on ircII.
CGI:IRC: A Web based IRC Client written in Perl with a simple but powerful interface.
dIRC: Windows IRC client. Support connections to multiple connections, numerous scripting languages, and other unique features.
EPIC: Popular ircII-based IRC client with added features.
ERC: An Emacs IRC client.
Ghoti: Feature-rich, GUI based IRC client for unix, written in perl-tk.
HydraIRC: Fast, feature packed and customizable, handles multiple-servers. Open Source, written in C++/WTL.
IceChat: Simple, Multi Server IRC Client with a unique interface.
IRCFree: Free IRC client for windows with scripting capabilities.
IRCfs: Standalone IRC file server for Linux.
ircII EPIC4 for OpenVMS: A port of the ircII EPIC4 Unix IRC client to the OpenVMS operating system.
IRCII EPIC4 For Windows: Windows and Cygwin port of EPIC.
ircII project: The original IRC client. Contains downloads, information, and mailing lists.
IRCJunkie: Website for IRC users. News, articles, quotes and funny logfiles.
IRCmmm: IRC Client written in C# .NET. Similar look to MSN messenger.
IRCXpro: IRC client that works exactly like an instant messenger.
Irssi: Powerful text-based IRC client for UNIX with perl scripting support.
jIRCii: Cross platform Internet Relay Chat client. It is fully scriptable using a Perl-like language called sleep. It includes DCC/CTCP support, the ability to connect to SSL servers, and over 65 built-in commands.
Klient: Windows IRC client. Uses DLLs rather than scripting to increase speed and lower processor demand.
KvIRC: Unix based IRC client. Contains screenshots, client news, help and support, features list and miscellaneous section.
leafChat: Advanced IRC client for Windows with many useful functions and features.
MonIRC: A single channel IRC client for Windows. Designed to help channel operators maintain their channel.
NetIRC: Freeware client for Windows. Contains download link, information, support and screenshots.
Node IRC Client: An open source IRC client for Windows, programmed in Visual Basic. Contains client news, downloads, documentation, and forums.
Real 3D Chat: Allows you to chat in real 3D in front of functional, scrollable Webpages with avatars who talk via bubbles.
savIRC: An IRC Client written in the tcl/tk programming language. Both Windows and Linux compatible. Contains screenshots, news, Forum, download area and documentation.
SharpIRC: A GPL'd IRC client written in C#.
sirc: Text-based IRC client for Unix with perl scripting features.
SpiffyStats: Windows-based IRC statistics generator. Generates detailed stats based on your channel's log files.
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.
TurboIRC: Windows IRC client with enhanced features and scripting capabilities.
upIRC: An IRC client for PalmOS.
Vortec IRC: Includes client news, support, screenshots, and contact information.
WavGet: Easy to use freeware and shareware. Home of Wavget, Sweep, ICE, and Adwizard.
XChat: A GTK+ X-windows client with Perl and Python scripting support.
XdccIRC client: Java IRC client to help you get stuff from XDCC Bots.