Google I/O 2009 – Building Applications with Google APIs Ray Cromwell Google offers a wide variety of APIs in many domains that together form a complete platform, from authentication and authorization, cloud computing, and social networking, to visualization, mobile computing, and Google Web Toolkit. In this talk, we will walk though a complex application that integrates many APIs together, how each can solve a different need in your application, how you can share code between GWT, Android, and App Engine, and how you can monetize your application with Google Checkout. For presentation slides and all I/O sessions, please go to: code.google.com/events/io/sessions.html