Noisli - Noisli is a fantastic background noise and color generator for working and relaxing. Online soothing ambient sounds like White noise, Rain and Coffee Shop.
DBeaver - DBeaver - Universal Database Manager and SQL Client.
Noizio - Feeling that the noise of the big city is too much for you to bear?
DataGrip - Tool for SQL and databases
zenmix.io - Ambient background sound generator
HeidiSQL - HeidiSQL is a powerful and easy client for MySQL, MariaDB, Microsoft SQL Server and PostgreSQL. Open source and entirely free to use.