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
PushMon
Description: PushMon is an open-source server monitoring and alerting tool. It provides monitoring of servers, services, websites, and applications with notifications when issues occur. Useful for sysadmins and DevOps.
Type: software
Pricing: Open Source