Upstash - Upstash provides Serverless Redis and Kafka as a service.
DBeaver - DBeaver - Universal Database Manager and SQL Client.
restdb.io - restdb.io lets you create databases and REST APIs quickly. Development databases are free. Powerful web-based and mobile-friendly data management.
DataGrip - Tool for SQL and databases
PlanetScale - The last database you'll ever need. Go from idea to IPO.
HeidiSQL - HeidiSQL is a powerful and easy client for MySQL, MariaDB, Microsoft SQL Server and PostgreSQL. Open source and entirely free to use.