Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
NetBox - NetBox is an open source web application designed to help manage and document computer networks. NetBox was developed specifically to address the needs of network and infrastructure engineers.
UptimeRobot - Free Website Uptime Monitoring
FusionLayer - FusionLayer collates all network information into a single Network Source of Truth â on-premise, at the edge, and in the public cloud.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
phpIPAM - phpipam is an open-source web IP address management application (IPAM).