Project Description
DocumentDB Studio is to Azure DocumentDB what SQL Management Studio is to SQL Server and SQL Azure: a one-stop shop to manage and interact with your DocumentDB.

See this blog post for details.

Also you can look at those articles for detailed guidelines:

• Creating an Azure DocumentDB account
• Installing DocumentDB Studio / Upgrading DocumentDB Studio
• Managing Databases and collections in DocumentDB Studio
• Managing Documents with DocumentDB Studio
• Querying Collections with DocumentDB Studio