CBIRC (Christoph Bratschi's IRC Client)
CBIRC is written for Java 1.4.1 or higher. There are a Webstart and an applet version available. CBIRC supports several simultaneous connections to IRC servers. RFC 1459/2812, ANSI, mIRC, CTCP/2 styles and colors, emoticons, flood protection, web links, CTCP and DCC are supported. Plus many more features.