Security reading
Article 1, §1 of the California Constitution articulates privacy as an inalienable right.
https://www.law.cornell.edu/anncon/html/amdt9_user.html#pg1501
https://support.google.com/legal/troubleshooter/1114905?rd=2
Email privacy - (politely decline to state)
Reputation
Scanners
URL scanners
SSL Scanners
Email addresses validators
Malware and Virus scanners
DNS Scanners
Blacklists
https://sites.google.com/site/obfuscatedintheclear/home/blacklist/blacklist.txt?attredirects=0&d=1
https://palevotracker.abuse.ch/blocklists.php?download=ipblocklist
https://zeustracker.abuse.ch/blocklist.php?download=ipblocklist
Reg-ex
Health of the internet
Search
https://webcache.googleusercontent.com/search?q=cache:example.com&strip=1
https://pentest-tools.com/network-vulnerability-scanning/tcp-port-scanner-online-nmap
Reference lists
Network ports
https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.txt
http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml
Other