Kopete - Kopete Kopete is a multi-protocol instant messenger, supporting ICQ, AIM, Gadu-Gadu, IRC, MSN Messenger, and Yahoo! Messenger written for the KDE desktop into which it integrates very well. Project history December 26, 2001 Duncan Mac-Vicar Prett starts coding a KDE ICQ clone after the ICQ protocol changed, causing LICQ to be unable to login on the network. After a few weeks learning the KDE API, Licq was updated. Duncan designs a basic plugin API based on Noatun and refocuses Kopete as a plugin based multiprotocol client. Nick Betcher joins Duncan. Nick codes an AIM plugin based on the Kit AIM engine, while the ICQ plugin was based on the KxICQ engine, called KxEngine. Duncan continues working on the core library and a basic MSN plugin, based.
Gaim - to use them. Gaim is Free Software available under the GNU GPL. Gaim was originally written for unix-like operating systems, but is now also available for Windows. See also: Trillian, Miranda IM, Kopete, Milkbone External Link Gaim Home Page Introduction to Gaim.
Trillian - Galaxy by Douglas Adams. Cerulean Studios recently released version 2.0 of Trillian, and are working on revising the free version of Trillian. Alternate Multiprotocol Clients Examples of other multi-protocol instant messaging clients for Windows include Miranda IM (open source) and jabber. For Linux and other Unix-like operating systems they include Kopete (KDE). The Milkbone and Gaim clients works on both Windows and Unix-like operating systems. Like trillian both Gaim and Miranda IM support feature extensions via plugins. Miranda IM has a far more extensive-, varied-, and feature laden collection of plugins than trillian. Miranda IM plugins, like Miranda IM itself are free. See also: designHazard, who designed Trillian's default skin.
MICQ - acknowledged and non-acknowledged unicode encoded messages (it even understands UTF-8 messages for message types the ICQ protocol does not use them for) and its support for client detection (which once was pirated by SIM/Kopete). It is also capable of running several UINs at the same time. mICQ is licensed under the terms of version 2 of the GNU General Public License. Versions prior to micq 0.4.8 were released by Matt D. Smith into the public domain; however, not much of the original code remains. All later additions were by Rüdiger Kuhlmann, in particular the support for the current ICQ v8 protocol..