ICQ (or 'I Seek You') is an instant messaging service to find friends, colleagues and people with similar interests.
With ICQ Instant Messenger you can video/audio chat, send email, SMS, and wireless-pager messages, as well as transfer files and URLs. If you're away from your personal computer you can still chat with friends and contacts, even where the ICQ client is not installed, by using the web-based ICQ2Go that works from any computer.
ICQ incorporates IP telephony functions enabling you to engage in PC-to-PC and PC-to-phone calls. Used in multiple-user mode, groups can conduct conferences or play games with ICQ. In fact, ICQ supports a variety of popular Internet applications and serves as a Universal Platform from which you can launch peer-to-peer applications.