Redis - Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.
MongoDB - MongoDB (from "humongous") is a scalable, high-performance NoSQL database.
Hazelcast - Clustering and highly scalable data distribution platform for Java
Aibase - Creative Data Manager
memcached - High-performance, distributed memory object caching system
Binders by Generism - High Level Database & Forms Application. An innovative solution to manage your database.