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
memcached - High-performance, distributed memory object caching system
SAP HANA - SAP HANA is an in-memory, column-oriented, relational database management system.
Ninox - Ninox is a human-friendly database. Create your own Business Application with Ninox that matches your workflow. Ninox lets you integrate CRM, ERP, HR and many more...