Azure Cosmos DB will support table and graph APIs
Azure Cosmos DB will be a globally distributed, multi-model database from Microsoft. While DocumentDB will continue to remain available as an API, Cosmos DB will also support document (MongoDB) APIs, key-value (Tables), and graph (Gremlin) APIs. With the preview of the Tables API, you'll be able to take advantage of premium features like indexing, low latency, and global distribution using the Azure Table Storage SDKs. With the preview of Graph API, you'll be able to store massive graphs and traverse them efficiently using the open Gremlin standard. There will be no additional charge for using Gremlin API Preview. DocumentDB and MongoDB APIs will soon be generally available.
Read more in this introduction to Azure Cosmos DB.