Microsoft SharePoint Server 2013

Microsoft SharePoint Server 2013
Start building a new class of apps that extend and personalize the way you create and consume information within Office and SharePoint. There’s no need to set up your environment; we do it for you. Just sign up for an Office 365 Developer Subscription.
-Web applications
Build apps using familiar widely-adopted languages, such as HTML, JavaScript, OAuth, and REST/Odata and your favorite web development tools with an open cloud app model.
-Hosted in the cloud
Host your app on any platform to get the flexibility and scalability you need, and distribute it publically or internally.
-Interacting with Office and SharePoint
Interact with content in Office documents and SharePoint using web technologies such as HTML and JavaScript.