DBeaver - DBeaver - Universal Database Manager and SQL Client.
4D - 4D is a relational database management system and IDE.
DbVisualizer - DbVisualizer is the universal database tool for developers, DBAs and analysts.
Informix - IBM Informix is a secure embeddable database optimized for OLTP and IoT data. Informix can seamlessly integrate SQL, NoSQL/JSON, and time series and spatial data.
DataGrip - Tool for SQL and databases
H2 Database - H2 is free SQL database written in Java