Several ICQ clients are available on metalab.unc.edu. (Refer to: "Where Are the Linux FTP Archives?") ICQ itself does not have a Linux client, but there is a Java client at http://www.mirabilis.com/download/.
© 2015, O’Reilly Media, Inc.
All trademarks and registered trademarks appearing on oreilly.com are the property of their respective owners.