Google Apps Part III – Google Apps Applications: The default applications available in Google Apps, in addition to mail, are Calendar, Documents and Sites. About 6 months back, Google launched Google Apps Marketplace. The Google Apps Marketplace offers web-based applications that work seamlessly with Google Apps. Email = Gmail No doubt that many of us had a chance to have our private (free) emails with a couple of service providers! Personally speaking about myself, I have experienced usa.net, lycos, hotmail, yahoomail etc., and now with Gmail. There is no second thought that the Gmail experience is the best among all.