relay2me is a free chat program that supports both Macintosh and Windows. Chat with large groups of people with ease. Now you can use this handy and easy-to-use messaging tool to talk to large groups of people.
Its main feature is real-time group discussion, where up to 200 people can participate in the same chat room. You can create as many chat rooms as you wish. It also supports IM, file transfers, and audience polling.

The license of this software is Freeware, you can free download and free use this instant messenger software.