Electronic Frontier Foundation or
cerbot
to get certbot and have full https on your site
https://protonmail.ch or (New!)
https://proton.me
email system in Switzerland with end-to-end encryption |
free accounts available
https://www.qubes-os.org/ | Qubes OS: A reasonably secure operating system
https://kali.org/ | Kali Linux distro for ethical security testing
https://tails.boum.org/ | Tails: Privacy for anyone anywhere
https://signal.org/ | Signal secure messaging