As an Office 365 developer, build custom SharePoint apps in Visual Studio using HTML5, CSS, and jQuery. Create declarative workflow applications with Visio and SharePoint Designer. Use Access Web Database to publish your data on the web, or write Exchange and Lync applications. All these possibilities and more are covered. You also have unprecedented control and flexibility over how you use these technologies in your applications. With a powerful set of Office 365 APIs, you can now access and integrate Office 365 data directly into your web or native applications, with full control of authentication, authorization and discovery.