Datomic - The fully transactional, cloud-ready, distributed database
Microsoft SQL - Microsoft SQL is a best in class relational database management software that facilitates the database server to provide you a primary function to store and retrieve data.
DynamoDB - Amazon DynamoDB is a fast and flexible NoSQL database service for all applications that need consistent, single-digit millisecond latency at any scale. It is a fully managed cloud database and supports both document and key-value store models.
MySQL - The world's most popular open source database
Valentina Server - Valentina Server is 3 in 1: Valentina DB Server / SQLite Server / Report Server
PostgreSQL - PostgreSQL is a powerful, open source object-relational database system.