Dataedo - Database documentation tool
DBeaver - DBeaver - Universal Database Manager and SQL Client.
MySQL Workbench - MySQL Workbench is a unified visual tool for database architects, developers, and DBAs.
ApexSQL Doc - ApexSQL Doc creates database documentation in a variety of formats.
HeidiSQL - HeidiSQL is a powerful and easy client for MySQL, MariaDB, Microsoft SQL Server and PostgreSQL. Open source and entirely free to use.
DbSchema - DbSchema - Visual Database Design & Management Tool