Microsoft SQL Server Compact - Bring Microsoft SQL Server 2017 to the platform of your choice. Use SQL Server 2017 on Windows, Linux, and Docker containers.
Redis - Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.
NuoDB - A scale-out SQL database for global operations
memcached - High-performance, distributed memory object caching system
UnQLite - UnQLite is a in-process software library which implements a self-contained, serverless...
MongoDB - MongoDB (from "humongous") is a scalable, high-performance NoSQL database.