DBeaver - DBeaver - Universal Database Manager and SQL Client.
DB Designer - fabFORCE.net Database Tools
DataGrip - Tool for SQL and databases
Vertabelo - Online tool for visual database design.
HeidiSQL - HeidiSQL is a powerful and easy client for MySQL, MariaDB, Microsoft SQL Server and PostgreSQL. Open source and entirely free to use.
DeZign for Databases - Database design and modeling tool - DeZign for Databases.