iChat (formerly iChat AV) is an AOL Instant Messenger (AIM), MobileMe, ICQ and XMPP client by Apple Inc. for their Mac OS X operating system. Using a Jabber-like protocol and Bonjour for user discovery, it also allows for LAN communication.
iChat (formerly iChat AV) is an AOL Instant Messenger (AIM), MobileMe, ICQ and XMPP client by Apple Inc. for their Mac OS X operating system. Using a Jabberlike protocol and Bonjour for user discovery, it also allows for LAN communication. iChat's AIM support is fully endorsed by AOL, and uses their official implementation of the AIM OSCAR protocol. Using a Jabber transport, iChat users may also integrate their MSN, Yahoo! and Google Talk contacts into the Jabber pane.
chat-clients instant-messaging Discontinued icq google-talk aol skype adium
Jitsi (previously SIP Communicator) is an audio/video and chat communicator with full end-to-end encryption that supports protocols such as SIP, XMPP/Jabber, ICQ/AIM, Windows Live, Yahoo!, GTalk/Hangouts extensions, as well as OTR, ZRTP...
Free Open Source Mac OS X Windows Linux Android BSD Web
LINE is a Japanese proprietary application for instant messaging on smartphones and PCs. Line users exchange text messages, graphics, video and audio media, make free VoIP calls, and hold free audio or video conferences.
Freemium Mac OS X Windows Android iPhone Android Tablet Web Blackberry Windows Phone