PopSQL - Modern SQL editor for teams
ObjectBox - ObjectBox empower edge computing with an edge device database and synchronization solution for Mobile & IoT. Store and sync data from edge to cloud.
SQL Police Department - Learn SQL while solving crimes! Climb the ranks of SQL PD.
Microsoft SQL Server Compact - Bring Microsoft SQL Server 2017 to the platform of your choice. Use SQL Server 2017 on Windows, Linux, and Docker containers.
DrawSQL - Easy database diagrams. Create, visualize and collaborate on your database entity relationship diagrams.
VoltDB - In-memory relational DBMS capable of supporting millions of database operations per second