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.
SolarWinds IPAM - Find out about getting started with IP Address Manager, including the latest release notes and documentation as well as training and helpful articles on how to best run SolarWinds IP Address Manager (IPAM).
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
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.
Better Uptime - We call you when your website goes down
Infoblox DDI - Infoblox’s industry leading integrated, centrally managed approach to delivering enterprise-grade DNS, DHCP, and IP address management (DDI) supports current and evolving IT needs.