Miranda IM is an open source instant messenger that allows users to customize almost every aspect of the appearance and functionality of the program by installing plug-ins. There are hundreds of plugins, icons, sounds and other content for Miranda IM available.
Using appropriate plugins the messenger can support all popular networks including AIM (AOL Instant Messenger), Facebook, Gadu-Gadu, IAX (Inter-Asterisk Exchange), ICQ, IRC (Internet Relay Chat), Jabber, MSN, Netsend, Tlen, Yahoo and more. Miranda IM Messenger can be equipped with features to create archives of conversations, news feeds, listen to online radio streams, block users, display emoticons in the chat window, create styles for a list of contacts and much more.
Plugins available for Miranda IM also add to this app an option to display notification of incoming messages, play sounds for selected events, encrypt outgoing messages, block contacts, open conversations in tabs, send free SMS via gateways etc. This free messenger can also run a spell checker, offers support for displaying avatars, block spam messages, handling shortcuts, send files to other users, make screenshots or play online games.