DBeaver - DBeaver - Universal Database Manager and SQL Client.
Zylo - Zylo helps organizations optimize their SaaS investments by providing insights around Spend, Utilization, and User Feedback.
DataGrip - Tool for SQL and databases
Zluri - SaaS Management and Identity Governance Platform for IT Teams
HeidiSQL - HeidiSQL is a powerful and easy client for MySQL, MariaDB, Microsoft SQL Server and PostgreSQL. Open source and entirely free to use.
Blissfully - Blissfully offers solutions to track, manage, and optimize SaaS spendings.