Agora is a Web-based, threaded discussion tool, similar to Usenet newsgroups. Agora remembers each user's preferences, and allows threaded, unread-only browsing. It offers the ability to manage several different groups, with different themes, forums, and administrators for each group. Agora offers a basic Web-based ICQ client, as well as a Web-based notes system.
IMIRC is an AOL Instant Messenger to IRC gateway. It connects to an IRC network as an IRC server, so it requires a local ircd to run. IMIRC creates nicknames for AIM users as they sign on, and converts HTML codes, which are used by AIM for formatting, to IRC's control code equivalents. Please note that you must either have your own working IRC server or you must find someone willing to let you link to theirs.
CGI:IRC is a Perl/CGI program that allows you to use IRC from a Web browser without having to have access to an IRC port. It does not use Java, but it does need a browser capable of rendering frames. It can be used on a Web page to allow users to chat, or it can be used to access chat from behind a firewall.
DreamBot is an experimental IRC bot totally written in Perl. Its main features include a totally dynamic user and channel list (no need to deal with text files), a learning ability that's similiar to infobot, built-in seen and topten talkers support, notes/memos, pasting of Freshmeat and Slashdot news, and Babelfish (Altavista) translation. DreamBot doesn't require any extra Perl modules.
gnuBot is an IRC bot written in Perl, designed to be as flexible and easy to use as possible. Dynamically loadable modules are used for everything from networking to configuration, allowing parts to be swapped out at will. It is intended to be both a channel service bot, like an eggdrop, but also have infobot-like features.
irspider is a Linux-based IRC smartbot. It is very similar in functionality to a search engine on the Web. irspider goes out and spiders DCC offer bots that are in the same channel as itself, and stores tons of information on what those particular bots are offering. Users are then able to query irspider for matches against its database, or request a masslisting of everything that it knows about.