IRC

EzXDCC
Specializes in file sharing bots, includes a list of crawled networks, a support forum and a Web gateway for the engine's IRC channel.
http://www.ezxdcc.com/

Gogloom
Offers a directory and a search engine to find channels. Includes a Java applet for connecting directly to chat rooms from within the web browser.
http://www.gogloom.com/

IRC Monitor
Allows keyword searches for chat rooms and provides activity graphics per channel.
http://en.irc-monitor.com/

ircAMP.com
IRC search engine specialized in XDCC file sharing bots. Also includes a list of networks.
http://www.ircamp.com/

IRCfoton
Displays random photographs of IRC users upon each page refresh.
http://ircfoton.com/

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

IRCNews
Provides news, information and resources such as support and downloads.
http://www.ircnews.co.uk/

IRSeek
Features a database of IRC channel logs searchable using boolean query strings. Covers most major networks.
http://www.irseek.com/

LiveHubs
Offers the ability to create IRC based chat channels free of charge. No registration required.
http://www.livehubs.com/

PacketFind
Allows users to search for files shared on IRC, also includes a support forum and a list of crawled networks.
http://www.packetfind.com/

Packetnews.com
XDCC search engine, includes a list crawled networks and of the latest packets as well as a page displaying the status of submitted channels.
http://www.packetnews.com/

QDB: Quote Database
Collection of amusing quotes from channel users. User submitted and rated.
http://bash.org/

XDCC Report
Search engine which focuses on file sharing bots. Includes the list of crawled networks and of latest reports as well as a support forum.
http://www.xdccreport.com/