miRC is an iRC client for windows that's very popular.
Here's where you can find it: http://www.mirc.com

A collection of old miRC Scripts i made a long time ago

CTCP Flood Protection: http://www.donagrejja.com/projects/ircscripts/flood-ctcp.zip
Freespace: http://www.donagrejja.com/projects/ircscripts/freespace.zip
Fileserver: http://www.donagrejja.com/projects/ircscripts/fserver.zip
FTP Server Ad: http://www.donagrejja.com/projects/ircscripts/ftp-ad.zip
Multimode: http://www.donagrejja.com/projects/ircscripts/multimode.zip
Pirate Language: http://www.donagrejja.com/projects/ircscripts/pirate.zip
Remote Control: http://www.donagrejja.com/projects/ircscripts/remote.zip
Web Page Ad: http://www.donagrejja.com/projects/ircscripts/web-ad.zip