In contrast to Web Applications, Websites are designed to be more informative and introductory, when Web Applications are for more about work with data and data representation.
Almost all of these technologies highly coupled and mainly product of Microsoft, which makes our product more reliable. Also included consultation and Email setup (Microsoft Outlook, Yandex Mail, Google Mail).
Optional features also can be provided. For instance RSS, Atom, Newsletters, Membership, et cetera.