MongoDB - MongoDB (from "humongous") is a scalable, high-performance NoSQL database.
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...
Redis - Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.
SAP HANA - SAP HANA is an in-memory, column-oriented, relational database management system.
Amazon Aurora - MySQL and PostgreSQL-compatible relational database built for the cloud. Performance and availability of commercial-grade databases at 1/10th the cost.
Azure Cosmos DB - NoSQL JSON database for rapid, iterative app development.