NoSQL Flavors

On my TODO list: try two of these. 

Big Table or Wide Column Store

-          Hadoop/HBase (Facebook)

-          Cassandra

-          HyperTable (Google)

-          Amazon SimpleDB

Document Store

-          MongoDB (JSON documents) (FourSquare)

-          CouchDB (JSON documents)

Key-Value

-          Amazon DynamoDB

-          Memcached

-          Oracle Coherence

-          Apache Voldemort (LinkedIn)

XML

-          MarkLogic

-          Apache Xindice (retired)