MongoDB - MongoDB (from "humongous") is a scalable, high-performance NoSQL database.
Redis - Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.
Qizx - XML Databases
SAP HANA - SAP HANA is an in-memory, column-oriented, relational database management system.
BaseX - BaseX is a very light-weight, high-performance and scalable XML Database engine and XPath/XQuery...
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...