*[https://help.riseup.net/en/security/message-security/openpgp/best-practices Message Security] - by the RiseUp folks. A very thorough guide on all aspects of PGP/GPG encryption. Windows and Linux. 11 languages.
*[https://github.com/freedomofpress/encryption-works/blob/master/encryption_works.md#pretty-good-privacy-pgp-email-encryption Encryption works] - A good introduction to various topics related to public key encryption and more. Originally written by Micah Lee of the Intercept
*[https://ssd.eff.org/en/playlist/want-security-starter-pack#communicating-others PGP/GPG set-up guides from the EFF] for [https://ssd.eff.org/en/module/how-use-pgp-windows-pc Windows], [https://ssd.eff.org/en/module/how-use-pgp-linux Linux] and [https://ssd.eff.org/en/module/how-use-pgp-mac-os-x MacOS]11 languages.
*[https://securityinabox.org/en/guide/thunderbird/windows Setting up GnuPG and email with Thunderbird] - from the Security in-a-box project. Windows users. 13 different languages. And similar guide from the [https://emailselfdefense.fsf.org/ Free Software Foundation].
*[https://www.mailvelope.com/en/help Mailvelope documentation] - Browser plugin for GPG encryption. Works with most webmail clients. For Mozilla Firefox and Google Chrome.
/how-use-pgp-mac-os-x MacOS]. 9 languages.
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