Valentina Server - Valentina Server is 3 in 1: Valentina DB Server / SQLite Server / Report Server
Datomic - The fully transactional, cloud-ready, distributed database
Google Cloud Datastore - Cloud Datastore is a NoSQL database for your web and mobile applications.
Oracle TimesTen - TimesTen is an in-memory, relational database management system with persistence and...
Datahike - A durable datalog database adaptable for distribution.
MySQL - The world's most popular open source database