ObjectBox - ObjectBox empower edge computing with an edge device database and synchronization solution for Mobile & IoT. Store and sync data from edge to cloud.
PostgreSQL - PostgreSQL is a powerful, open source object-relational database system.
CompactView - Viewer for Microsoft® SQL Server® CE database files (sdf)
SQLite - SQLite Home Page
HSQLDB - hsqldb: Full-featured 100% Java ORDBMS
MongoDB - MongoDB (from "humongous") is a scalable, high-performance NoSQL database.