openpgp

Community guide to using YubiKey for GnuPG and SSH - protect secrets with hardware crypto.

End-To-End is a crypto library to encrypt, decrypt, digital sign, and verify signed messages (implementing OpenPGP)

[Unmaintained] Open source two-factor authentication for Android

Bouncy Castle Java Distribution (Mirror)

Android application compatible with ZX2C4's Pass command line application

OpenKeychain is an OpenPGP implementation for Android.

BouncyCastle.NET Cryptography Library (Mirror)

Manage your GnuPG keys with ease! 🔐

Open-source, privacy-focused email service for custom domains. Free email forwarding, encrypted mailboxes (IMAP/POP3), SMTP sending, calendars and contacts (CalDAV/CardDAV), webhooks, and an email API. Self-host it with Docker. A private alternative to Gmail, Mailchimp, and SendGrid.

Python library and command line tool for configuring any YubiKey over all USB interfaces.

OpenPGP implemented in pure Rust, permissively licensed

The GNU Privacy Guard. NOTE: Maintainers are not tracking this mirror. Do not make pull requests here, nor comment any commits, submit them usual way to bug tracker (https://www.gnupg.org/documentation/bts.html) or to the mailing list (https://www.gnupg.org/documentation/mailing-lists.html).

Generate links that users can use to submit messages encrypted with your public key.

Chatmail Rust Core library, used by Android/iOS/desktop chatmail apps, bindings and bots 📧

A modern, cross-platform OpenPGP tool with a unique dual-engine core: switch freely between the battle-tested GnuPG and a modern, memory-safe Rust rPGP backend. It makes encryption, signing, and key management easier and more trustworthy in everyday privacy workflows.

ObjectivePGP is an open-source library for iOS and macOS that provides developers with tools for implementing OpenPGP encryption and decryption, digital signing, and signature verification in their applications, thereby enhancing security and data integrity.

Mail and calendar for Linux and macOS. Gmail and IMAP accounts, Google Calendar, contacts, OpenPGP and S/MIME. GTK4 and libadwaita, written in Rust.

A tool to detect when your YubiKey is waiting for a touch (to send notification or display a visual indicator on the screen)

OpenPGP (RFC4880) Implementation in IcedCoffeeScript

Password and passkey manager application for Android, compatible with ZX2C4's Pass command line application