Hadoop is open source framework written in java. It efficiently process large volumes of data on cluster of commodity hardware. Data may range from terabytes to petabytes or even zeta-bytes.read more
Redis is an open source, in-memory but persistent on disk advanced key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets.read more
Neo4j is a high-performance, NOSQL graph database. Neo4j can handle graphs of several billion nodes, relationships and properties on a single machine and can be shared to scale out across multiple machinesread more
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