Author / Creator First public release date Type Latest stable version Cost (USD) Software license
Adium Adam Iser, Evan Schoenberg September, 2001 Multi-protocol 0.89.1 Free GPL v2
AIM AOL May, 1997 Single protocol 5.9.3797 (Windows)
4.7.1333 (Mac OS X)
1.5.286 (Linux)
Free
Adware
Proprietary
aMSN Alvaro J. Iradier Muro May, 2002 Single protocol 0.95 Free GPL
BeeNut Total Achieve International Ltd April, 2005 Multi-protocol 2.016 Free Proprietary
BitWise IM BitWise Communications, LLC March 17, 2002 Single protocol 1.7.1 Free Proprietary
BitlBee Wilmer van der Gaast August 9, 2002 IRC Gateway, Multi-protocol 1.0.2 Free GPL
Centericq Konstantin Klyagin ? Multi-protocol 4.21.0 Free GPL
Coccinella Mats Bengtsson December 1, 1999 Single protocol 0.95.11 Free GPL
eMessenger Paulo Taylor 2004 MSN/Yahoo!/AOL, Web-based ? Free Proprietary
Exodus Peter Millard 2002 Jabber 0.9.1.0 Free GPL
Fire Eric Peyton ? Multi-protocol Free GPL
gaim Mark Spencer November, 1998 Multi-protocol Free GPL
Gajim Yann Le Boulanger May 21, 2004 Single protocol 0.9.1 Free GPL
GCN Jason K. Resch November 18, 2000 Single protocol 2.9.1 Free
Adware
Proprietary
GOIM Herbert Poul August 16, 2005 Single protocol 1.0.3 Free GPL
Google Talk Google, Inc. August 24, 2005 Single protocol Free Proprietary
iChat Apple Computer August, 2002 Multi-protocol 3.1.4 (432) Free Proprietary
ICQ Mirabilis November, 1996 Single protocol 5 Free
Adware
Proprietary
IM2 IM2 Limited April, 2003 Multi-protocol 1.5 Free Proprietary
IMVITE IMVITE Inc. August, 2005 Multi-protocol 1.3 Free Proprietary
IMVU IMVU ? Multi-protocol beta Free Proprietary
Instan-t Interactive Networks Inc. March, 2001 Multi-protocol 4.5 Free Proprietary
JAJC Mikel Ivanov 2002 Single protocol 0.0.8.113 Free Proprietary
Kadu Kadu Team August, 2001 Single protocol 0.4.2 Free GPL v2
Kopete Kopete Team March 3, 2002 Multi-protocol 0.11 Free GPL
Laffer Slavey Karadzhov May 17, 2004 Multi-protocol 0.3.3.1 Free GPL
Licq Graham Roff (up to v1.0)
Jon Keating
June 22, 1998 Multi-protocol 1.3.2 Free GPL
MECA Messenger Meca Communications ? Multi-protocol, Web-based 5.2 Free Proprietary
meebo Seth, Elaine, & Sandy 2005 Multi-protocol, Web-based alpha v8 Free ?
Meetro Paul Bragiel & Wendell Davis 2005 Multi-protocol Beta 0.93 Free ?
Mercury Messenger Mercury Messenger 2003 Multi-protocol 1710 Free Proprietary
mICQ Mattew D. Smith (up to ICQv5); Rüdiger Kuhlmann 1997(?); 2001 Single protocol 0.5.1 Free GPL v2
MindSpring Earthlink April 3, 2006 Multi-protocol 1.0 (v53.0) Free Proprietary
Miranda IM Miranda IM project February 6, 2000 Multi-protocol 0.4.0.3 Free GPL
Microsoft Messenger for Mac Microsoft ??? Single protocol 5.1.1 Free Proprietary
MSN Messenger Microsoft July, 1999 Single protocol 7.5.0311 (Windows XP)
7.0 (Windows 98,Me,2000)
Free
Adware
Proprietary
MSNCP Sebastián Santisi July, 2005 Single protocol 0.7.0-beta Free GPL
MySpaceIM Fox Interactive Media May 09, 2006 Single protocol 1.0.262.0-beta Free Proprietary
OpenWengo Wengo 2004 Single protocol 0.99 Free GPL
Proteus Justin Wood ? Multi-protocol 4.12 Free Proprietary
Psi Justin Karneges 2001 Single protocol 0.10 Free GPL
psyced psyced.org Project 1997 IRC Gateway, Multi-protocol 0.99 Free GPL
Qnext Qnext Corp. June 28, 2004 Multi-protocol 2.3.0.74 Free Proprietary
QQ Tencent February, 1999 Single protocol 2006 Beta1 FreeAdware Proprietary
Rediff BOL Rediff.com [1] circa 1999 Single protocol 7.0 Free Proprietary
SIM SIM project [2] ? Multi-protocol 0.9.3 Free GPL
Skype Niklas Zennström and Janus Friis / eBay 2003 Single protocol Free Proprietary
Softros LAN Messenger Softros Systems January, 2004 Single protocol 3.6 $10.95 Proprietary
talk Kipp Hickman 1982 Single protocol 1.7 (BSD version) Free BSD
Tkabber Alexey Shchepin 2003 Single protocol 0.9.8 Free GPL
Trillian Cerulean Studios July 1, 2000 Multi-protocol 3.1 Free Proprietary
Trillian Pro Cerulean Studios September 10, 2002 Multi-protocol 3.1 $25 Proprietary
Yahoo! Messenger Yahoo! June 21, 1999 Single protocol 7.5.0.811 (Win)
2.5.3 (Mac)
Free Proprietary
YSM rad2k 2001 Single protocol 2.9.6 Free GPL
Zephyr Project Athena 1987 Single protocol 2.0 Free MIT
Zoep Voipster January 25, 2006 Single protocol 0.8.5 Free GPL
Author / Creator First public release date Type Latest stable version