Sesame Database Manager - Lantica Software, LLC - Sesame, A Q&A-compatible Database Manager.
DBeaver - DBeaver - Universal Database Manager and SQL Client.
Sheep - Membership and events for SMEs and nonprofits
DataGrip - Tool for SQL and databases
DbFace - DbFace is an online database application & report building tool.
HeidiSQL - HeidiSQL is a powerful and easy client for MySQL, MariaDB, Microsoft SQL Server and PostgreSQL. Open source and entirely free to use.