NOSQL

http://blogs.msdn.com/b/bigdatasupport/

http://www.couchbase.com/

http://www.couchbase.com/sites/default/files/uploads/all/whitepapers/Couchbase_Server_Architecture_Review.pdf

http://www.ibm.com/developerworks/cn/data/library/ba/ba-hadoop-couchbase/index.html

documentdb

http://www.davidchappell.com/writing/white_papers/Introducing_DocumentDB-Chappell_v1.2.pdf

http://blogs.msdn.com/b/documentdb/

https://azure.microsoft.com/en-us/blog/tag/documentdb

https://azure.microsoft.com/en-us/services/documentdb/?rnd=1

https://en.wikipedia.org/wiki/Document-oriented_database

HDInsight

Try Hadoop on Azure HDInsight – No credit card needed

https://azure.microsoft.com/en-us/blog/try-hadoop-on-azure-hdinsight-7/

https://azure.microsoft.com/en-us/documentation/learning-paths/hdinsight-self-guided-hadoop-training/

https://azure.microsoft.com/en-us/documentation/services/hdinsight/