DBeaver - DBeaver - Universal Database Manager and SQL Client.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
MySQL Workbench - MySQL Workbench is a unified visual tool for database architects, developers, and DBAs.
Datadog - See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.
Sequel Pro - MySQL database management for Mac OS X
Prometheus - An open-source systems monitoring and alerting toolkit.