DBeaver - DBeaver - Universal Database Manager and SQL Client.
GraphQL - GraphQL is a data query language and runtime to request and deliver data to mobile and web apps.
DataGrip - Tool for SQL and databases
ProxySQL - ProxySQL: high-performance, GPL licensed MySQL proxy. It supports hundreds of thousands of concurrent connections and can be multiplexed to hundreds of servers.
HeidiSQL - HeidiSQL is a powerful and easy client for MySQL, MariaDB, Microsoft SQL Server and PostgreSQL. Open source and entirely free to use.
IntegrateDB.org - The integration database that doesn't smell.