freenode

freenode is an IRC network that supports the free software and open source communities.

For example, freenode hosts the forth channel and the colorforth channel.

Connect your favorite IRC client to irc.freenode.net

If you can't install software, you might be able to find web-based access to freenode on one of these sites: http://www.google.com/search?hl=en&lr=&q=%22CGI%3AIRC+Login%22+%22irc.freenode.net%22&btnG=Search