DBeaver - DBeaver - Universal Database Manager and SQL Client.
Agilon One - Agilon One is a Nonprofit CRM software solution that connects and gathers information on constituents.
DataGrip - Tool for SQL and databases
Little Green Light - Illuminating Data. Advancing Nonprofits.
HeidiSQL - HeidiSQL is a powerful and easy client for MySQL, MariaDB, Microsoft SQL Server and PostgreSQL. Open source and entirely free to use.
Donorhut - Donorhut offers cloud fundraising software for charities and non-profits of any size.