Hadoop is a powerful framework for automatic parallelization of computing tasks. Mostly available for Unix/Linux, this installer help develop applications and analyze big data stored in Apache Hadoop running on Microsoft Windows.
Monitoring is a critical component of all database administration. A number of third party monitoring tools have support for MongoDB. There are some very good tools available in the MongoDB package but the list provided here will help you a lot in administration.
Neo4j is an open-source graph database, implemented in Java. Developers describe Neo4j as "embedded, disk-based, fully transnational Java persistence engine that stores data structured in graphs rather than in tables". Neo4j is the most popular graph database.
Amazon Elastic MapReduce automatically spins up a Hadoop implementation of the MapReduce framework on Amazon EC2 instances. Amazon Elastic MapReduce (Amazon EMR) makes it easy to provision and manageHadoop in the AWS Cloud.