I need a program that is free (freeware) to use, with no limitations that will allow me to have a conference with many people. In this chat, I will be able to use my BlueTooth Headset to talk in the conference, and I will be able to show the other clients in the chat room my computer screen. As well, they will be able to talk back with me.

Does anybody know of any good (and remember, FREEWARE) software that I can use to do this? I'd really appreciate the help.