Azure Resource Manager Tools Preview for Visual Studio 2013 enables developers to create reusable deployment templates (JSON files) that declaratively describe the resources that make up an app. Tooling to validate and deploy these deployment templates is also provided. For example, a deployment template may include a website, Redis cache, SQL Azure database, and other resources. This simplifies the process of creating complex environments for development, testing, and production in a repeatable manner and provides a unified way to manage and monitor the resources that make up an app from the Azure Preview portal.
Read more about the Azure Resource Manager Tools Preview for Visual Studio 2013 on the Azure Blog