Facilitates real-time group chat and file sharing through any web browser.

Provides simultaneous, integrated access to multiple instant messaging services through any web browser. With a version optimized for mobile access.

Web messenger service that eliminates the need to download IM clients. Features most of the functions of major IM clients in a web-based interface.

Provides a web based interface to a variety of services, including Yahoo, AOL, Google Talk, MySpace, and Facebook.

Web-based platform for instant messengers providing convenient simultaneous access to multiple accounts through a single interface.

Free web-based instant messenger written entirely in PHP. Operates in multiple OS environments, including Windows and Linux.

Access to the Yahoo! IM service from any Java-enabled web browser.