QuakeNet is an IRC network, built around the gaming community, and is an organisation that facilitates the communication of many teams and online organisations. Though originally founded as a chat network for gamers, by gamers, QuakeNet welcomes everyone to chat about anything (within its rules). QuakeNet is also currently the largest chat network in the world, with a peak usercount each week of around 180,000 to 190,000 users (as listed by http://irc.netsplit.de/networks/).

Above text was excerpted from: http://quakenet.org/about.php