The Document sharing is really good to communicate with people that are on their own computers. The Meeting Words, Sync in, TitanPad, Pirate Pad programs are basically the same they have the same opitions and same features. The Primary Pad is just a little different because I don't think you can invite your friends to that program. But the ones that I did were prett cool but it was basically the same as the others that we were supposed to go on that the teacher assigned us. That's about it about the document sharing. I really liked it though.