Downping
Description: Downping is a free open-source website monitoring tool that checks if websites are up and running, and sends notifications if a site goes down. It pings sites regularly to check uptime and response time.
Type: software
Pricing: Open Source
Nmap
Description: Nmap is an open source network discovery and security auditing tool. It is used to discover hosts and services on a network and to detect potential vulnerabilities.
Type: software
Pricing: Free