MongoDB - MongoDB (from "humongous") is a scalable, high-performance NoSQL database.
ObjectBox - ObjectBox empower edge computing with an edge device database and synchronization solution for Mobile & IoT. Store and sync data from edge to cloud.
Redis - Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.
CompactView - Viewer for Microsoft® SQL Server® CE database files (sdf)
CouchDB - HTTP + JSON document database with Map Reduce views and peer-based replication
HSQLDB - hsqldb: Full-featured 100% Java ORDBMS