Status: Abandoned development.

Link: http://www.icq.com/

Pros: Used by countless people so worthwhile in many cases.

Cons: Requires Rosetta to run under more advanced Mac OS X installs, horrible and primitive early aqua interface.

Review: Version 3.4.23 was released 30th December 2002 so you can imagine how primitive this client is! Sadly ICQ seem to have sunk all Mac development, making them an unfavourable option for Apple users.