Editing ICQ (section)

==Clients==
[[AOL]]'s [[OSCAR protocol|OSCAR]] [[network protocol]] used by ICQ was [[Proprietary software|proprietary]] and using a third party client was a violation of ICQ Terms of Service. Nevertheless, a number of third-party clients were created by using reverse-engineering and protocol descriptions. These clients included:

* [[Adium]]: supports ICQ, [[Yahoo! Messenger|Yahoo!]], [[AOL Instant Messenger|AIM]], [[Microsoft Messenger service|MSN]], [[Google Talk]], [[Extensible Messaging and Presence Protocol|XMPP]], and others, for [[macOS]]
* [[Ayttm]]: supports ICQ, Yahoo!, AIM, MSN, [[Internet Relay Chat|IRC]], and XMPP
* [[BitlBee]]: IRC gateway, supports ICQ, Yahoo!, AIM, MSN, Google Talk, and XMPP
* [[Centericq]]: supports ICQ, Yahoo!, AIM, MSN, IRC and XMPP, text-based
* [[climm]] (formerly mICQ): text-based
* [[Jimm]]: supports ICQ, for [[Java ME]] [[mobile devices]]
* [[Kopete]]: supports AIM, ICQ, MSN, Yahoo, XMPP, Google Talk, IRC, Gadu-Gadu, Novell GroupWise Messenger and others, for Unix-like
* [[Meetro]]: IM and social networking combined with location; supports AIM, ICQ, MSN, Yahoo!
* [[Miranda NG]]: supports ICQ, Yahoo!, AIM, MSN, IRC, Google Talk, XMPP, Gadu-Gadu, BNet and others, for [[Microsoft Windows|Windows]]
* [[Naim (chat program)|Naim]]: [[ncurses]]-based
* [[Pidgin (instant messaging client)|Pidgin]] (formerly Gaim): supports ICQ, Yahoo!, AIM, Gtalk, MSN, IRC, XMPP, Gadu-Gadu, SILC, Meanwhile, ([[Lotus Sametime|IBM Lotus Sametime]]) and others
* [[Quiet Internet Pager|QIP]]: supports ICQ, AIM, XMPP and XIMSS
* [[stICQ]]: supports ICQ, for [[Symbian OS]]
* [[Trillian (software)|Trillian]]: supports ICQ, IRC, Google Talk, XMPP and others

AOL supported clients include:
* [[AOL Instant Messenger]] (discontinued in 2017)
* [[Messages (Apple)|Messages]]/[[iChat]]: uses ICQ's UIN as an AIM screenname, for [[macOS]]