Yahoo! Messenger (abbreviated as Y!M) – Instant messaging of the company Yahoo!, using its own protocol.

It exists for the platforms Windows, Mac, Linux (Unix). Distributed free of charge. To use the pre-registration on the portal Yahoo! is required.

The program is designed to communicate in real time with other Internet users.

The following possibilities: text communication, voice communication, in particular multi-user voice chat, video conferencing, phone calls to mobile and landline phones, file sharing, online gaming, customizable online broadcast of music, customizable integrated access to services of the portal Yahoo!, does not have the version with Russified interface but development in this direction is being held.