VistaDB - VistaDB is an all-in-one embedded database software for.Net that is completely compliant with ADO.NET providing support for the entity framework.

EXtremeDB - EXtremeDB is an extensive database management software that is creating an impact via extracting the actionable data for the predictive insight that, in turn, values the entire infrastructure.

MySQL - The world's most popular open source database

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.

MongoDB - MongoDB (from "humongous") is a scalable, high-performance NoSQL database.

SQLite - SQLite Home Page