WiGLE: Wireless Network Mapping — https://wigle.net/

DNS Checker - DNS Check Propagation Tool — https://dnschecker.org/

VirusTotal  — https://www.virustotal.com/gui/home/upload

Wireshark • Go Deep — https://www.wireshark.org/

Nmap: the Network Mapper - Free Security Scanner — https://nmap.org/

Suricata — https://suricata.io/

Download pfSense Community Edition — https://pfsense.org/download/

ZeroTier | Next-Generation Connectivity and Cybersecurity — https://www.zerotier.com/

Proton Mail: Get a free email account with privacy and encryption | Proton — https://proton.me/mail