Redis - Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.
Apache Storm - Apache Storm is a free and open source distributed realtime computation system.
memcached - High-performance, distributed memory object caching system
MongoDB - MongoDB (from "humongous") is a scalable, high-performance NoSQL database.
Apache Spark - Apache Spark is an engine for big data processing, with built-in modules for streaming, SQL, machine learning and graph processing.
Apache Ignite - high-performance, integrated and distributed in-memory platform for computing and transacting on...