ServerSuit - ServerSuit is a browser based program that enables remote Linux administration, monitoring, website hosting, and server setup automation.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Streamdal - We are APM for Data. Streamdal for Streaming Data Performance Monitoring gives you visibility into data in real-time at any scale. Get started for as little as $30 per month.
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.
Netumo - Ensure healthy website performance, uptime, and free from vulnerabilities. Automatic checks for SSL Certificates, domains and monitor issues with your websites all from one console and get instant notifications on any issues.
Prometheus - An open-source systems monitoring and alerting toolkit.