Peer-to-Peer Grids is a new trend in scientific computing and collaboration. It is based on the Peer-to-Peer and Grids technologies and leverages the advantages of both.We develop our collaborative PowerPoint and IE (Internet Explorer) applications with a common Peer-to-Peer Grid architecture. We make NaradaBrokering as our dynamic messaging environment and systematic use of Web Services as one type of our building blocks.Making PowerPoint and Internet Explorer applications collaborative using their event Meta data and Instant Message as Web Services is useful in situations such as long distance education and web conferencing. This is also a good demonstration of harnessing and leveraging of the power and richness of Web Services and Peer-to-Peer Grids computing.