IRCCloud is a modern, always-connected IRC client that works on mobile and the web.
You’ll always be connected to IRC, even if your browser is closed and your computer is offline. When you come back to your computer, you’ll be able to easily see and respond to new messages since the last time you checked.
You can use IRCCloud from multiple computers—a record of messages you’ve seen and responded to are automatically kept in sync, so you get a seamless experience every time.
ExileNET and CollectiveIRC are all linked together using an SSL connection making your conversations more secure especially when using our SSL port 7000. We value your privacy! Check us out via irc.exilenet.org:7000 or irc.collectiveirc.net:7000 or use our web client which also uses SSL at http://www.exilenet.org/chat.htm
Irssi and BitchX have always been my favorite IRC clients. Either running it on the Linux box or through PuTTy, it's a nice way to view IRC without all the annoying colors you get with mIRC and XChat. Light weight and highly configurable, irssi does it all from multi windows to SSL connections. Unfortunately for BitchX it seems to be being fazed out as it is no longer available in Debian however there still is irssi to enjoy.