As one of the common collaboration services, Messages provides a standards-based method of communicating with one or many other users.
The Messages service, previously known as iChat, allows users to collaborate in real time. Messages users can use the following features to quickly share information without the delay associated with email messages and wiki posts:
Exchange text messages instantly
Send files to each other
Set up an instant audio conference (using either the microphone built into many Mac computers or an external unit) ...