UptimeRobot - Free Website Uptime Monitoring
Cisco DNA Center - Find and resolve network issues with Cisco DNA Center. Provides software-based network automation and assurance. Control and manage intent-based networks.
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.
Nmap - Nmap Free Security Scanner, Port Scanner, & Network Exploration Tool. Download open source software for Linux, Windows, UNIX, FreeBSD, etc.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Auvik - Auvik’s network infrastructure RMM gives IT service providers better visibility, documentation, and...