DBeaver - DBeaver - Universal Database Manager and SQL Client.
Matisse - Matisse is a post-relational SQL database.
HeidiSQL - HeidiSQL is a powerful and easy client for MySQL, MariaDB, Microsoft SQL Server and PostgreSQL. Open source and entirely free to use.
Valentina Server - Valentina Server is 3 in 1: Valentina DB Server / SQLite Server / Report Server
DataGrip - Tool for SQL and databases
Datahike - A durable datalog database adaptable for distribution.