DBeaver - DBeaver - Universal Database Manager and SQL Client.
ServerSuit - ServerSuit is a browser based program that enables remote Linux administration, monitoring, website hosting, and server setup automation.
DataGrip - Tool for SQL and databases
RedGate SQL Monitor - SQL Monitor helps you and your team find issues – before they become problems
HeidiSQL - HeidiSQL is a powerful and easy client for MySQL, MariaDB, Microsoft SQL Server and PostgreSQL. Open source and entirely free to use.
AppZero - AppZero is a monitoring and migration tool that allows users to keep track of different applications and servers in both simple and complex IT environments.