Miranda IM is an open-source multi protocol instant messenger client for Microsoft Windows.

Miranda IM is the smaller, faster, easier instant messenger with support for multiple protocols. Designed from the ground-up to be resource efficient while still providing a rich feature set, Miranda includes support for AIM, Jabber, ICQ, IRC, MSN, Yahoo, Gadu-Gadu and more. Additionally, with the choice of hundreds of plugins, icons, sounds and other content, Miranda IM gives you the ability to modify, customise and extend functionality to make it your own.