Thunderbird
thunderbird is a free, open source, cross-platform e-mail, news and instant messaging client. the project strategy is modeled after mozilla firefox.
Sim-IM, Simple Instant Messenger, is a multiple protocol instant messenger for MS Windows, GNU/Linux, FreeBSD. Sim-IM supports Jabber/XMPP, Google Talk, ICQ and AIM (Oscar), Yahoo! Messenger and Microsoft Messenger (MSN) protocols.
SimIM, Simple Instant Messenger, is a multiple protocol instant messenger for MS Windows, GNU/Linux, FreeBSD. SimIM supports Jabber/XMPP, Google Talk, ICQ and AIM (Oscar), Yahoo! Messenger and Microsoft Messenger (MSN)protocols. SimIM is a free software, licensed under the GNU General Public License (GPL). SimIM is based on the Qt library, and can be built with KDEsupport option.
Productivity Social Online Services Web Browsers
instant-messaging Discontinued icq jabber jabber-clients multi-protocol xmpp google-talk xmpp-clients msn yahoo
thunderbird is a free, open source, cross-platform e-mail, news and instant messaging client. the project strategy is modeled after mozilla firefox.
Free Open Source Windows Linux BSD Mac Haiku
Trillian is an instant messaging app that works on phones, tablets, and desktops while keeping your chats neatly synchronized between all of them! We think conversation should be easily shared between all of your devices, not trapped as...
Freemium Mac OS X Windows Linux Android iPhone iPad Web Blackberry
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
Miranda IM is the smaller, faster, easier instant messenger with support for multiple protocols.
Free Open Source Windows
Facebook Messenger is a faster way to message. Reach friends right on their phones, get and send messages fast, message everyone at once and more.
Free Windows Android iPhone Android Tablet iPad Web Blackberry Apple Watch
Stay in touch with your friends and family while sharing favorite photos using one of the most popular instant messaging applications.
Free Android iPhone Web Blackberry
ICQ is one of the oldest instant messengers. First developed by the Israeli company Mirabilis, sold to AOL, sold again and currenly owned by the Russian "mail.ru" group (known for one of the largest social networks).
Free Mac OS X Windows Linux Android iPhone Web Windows Mobile Java Mobile
instantbird is an instant messaging client based on mozilla xulrunner and the open source library libpurple created by the software developers of pidgin .
Free Open Source Mac OS X Windows Linux
Tencent QQ, generally referred to as QQ, is the most popular free instant messaging computer program in Mainland China, and has over 856.2 million users. In April 2010, QQ.com ranked 10th overall in Alexas internet rankings.
Free Mac OS X Windows Android iPhone Android Tablet iPad Windows Phone Facebook