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
ServersUp.net
Description: ServersUp.net is a server and website monitoring service that allows users to monitor the uptime and response times of their websites, servers, and APIs. It provides alerts via email, SMS, and other channels when outages occur.
Type: software