mIRC is a full featured Internet Relay Chat client for Windows that allows users to communicate, share, play or work with others on IRC networks around the world, either in multi-user group conferences or in one-to-one private discussions. The interface of mIRC is clear and practical supports features such as buddy lists, file transfers, multi-server connections, IPv6, SSL encryption, proxy support, UTF-8 display, UPnP, customizable sounds, spoken messages, tray notifications, message logging, and more.
Besides, you can connect to more than one IRC server at once and chat through proxy. By creating your own channel, you can even set up a virtual meeting with colleagues. This program suits advanced users keen to expand their chat-client functionalities. For first-time users, mIRC offers the most functionality of any chat program available, which can be overwhelming at first--but if you read the help files you'll be on your way to using all the features mIRC has to offer.