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
Searx
Description: Searx is an open source, privacy-respecting metasearch engine that can be self-hosted. It allows users to search multiple search engines while not tracking or profiling them.
Type: software
Pricing: Open Source