SQL Developer - Oracle SQL Developer is a free, development environment that simplifies the management of Oracle Database in both traditional and Cloud deployments.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
DBeaver - DBeaver - Universal Database Manager and SQL Client.
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.
phpMyAdmin - phpMyAdmin is a tool written in PHP intended to handle the administration of MySQL over the Web.
Prometheus - An open-source systems monitoring and alerting toolkit.