MimeKit - A

•    CSharp

MimeKit is a C# library which may be used for the creation and parsing of messages using the Multipurpose Internet Mail Extension (MIME), as defined by numerous IETF specifications.As a developer and user of email clients, I had come to realize that the vast majority of email client (and server) software had less-than-satisfactory MIME implementations. More often than not these email clients created broken MIME messages and/or would incorrectly try to parse a MIME message thus subtracting from the full benefits that MIME was meant to provide. MimeKit is meant to address this issue by following the MIME specification as closely as possible while also providing programmers with an extremely easy to use high-level API.

MailKit - A cross-platform .NET library for IMAP, POP3, and SMTP.

•    CSharp

MailKit is a cross-platform mail client library built on top of MimeKit.The main goal of this project is to provide the .NET world with robust, fully featured and RFC-compliant SMTP, POP3, and IMAP client implementations.

OpenPGP.js - OpenPGP implementation for JavaScript

•    Javascript

OpenPGP.js is a JavaScript implementation of the OpenPGP protocol. It aims to provide an Open Source OpenPGP library in JavaScript so it can be used on virtually every device. This does not require gpg on their machines in order to use the library. The idea is to implement all the needed OpenPGP functionality in a JavaScript library that can be reused in other projects that provide browser extensions or server applications. It should allow you to sign, encrypt, decrypt, and verify any kind of text - in particular e-mails - as well as managing keys.

client - Keybase Go Library, Client, Service, OS X, iOS, Android, Electron

•    Go

Hi, and welcome to the Keybase client repo. All our client apps (macOS, Windows, Linux, iOS, and Android) are being actively developed in this repository. Please, dig around. We'd love you to read our source code.

neomutt - :email: Teaching an Old Dog New Tricks -- IRC: #neomutt on irc.freenode.net

•    C

Hopefully this will build the community and reduce duplicated effort. NeoMutt was created when Richard Russon (@FlatCap) took all the old Mutt patches, sorted through them, fixed them up and documented them.

age - A simple, modern and secure encryption tool

•    Go

age is a simple, modern and secure file encryption tool, format, and Go library. It features small explicit keys, no config options, and UNIX-style composability. It has support for public/private key pairs and passwords, with multiple recipients. An extremely simple CLI that composes well with UNIX pipes, and that works well as a backend for other programs. A good seekable streaming encryption scheme based on modern chunked AEADs, reusable as a general encryption format.

Mailpile - A free & open modern, fast email client with user-friendly encryption and privacy features

•    Python

Mailpile (https://www.mailpile.is/) is a modern, fast web-mail client with user-friendly encryption and privacy features. The development of Mailpile is funded by a large community of backers and all code related to the project is and will be released under an OSI approved Free Software license. Mailpile places great emphasis on providing a clean, elegant user interface and pleasant user experience. In particular, Mailpile aims to make it easy and convenient to receive and send PGP encrypted or signed e-mail.

WebClients - Monorepo hosting the proton web clients

•    TypeScript

This project is a monorepo hosting the proton web clients. It includes the web applications, their dependencies & shared modules as well as all tooling surrounding development of the web clients (as well as some additional miscellaneous things). Technically, this monorepo is based on Yarn 2 & Yarn Workspaces, with unified versioning for all packages inside.

passforios - Pass for iOS - an iOS client compatible with Pass command line application (http://www

•    Swift

Pass is an iOS client compatible with ZX2C4's Pass command line application. It is a password manager using GPG for encryption and Git for version control. Pass for iOS is available in the App Store with the name "Pass - Password Store".

SOPS: Simple and flexible tool for managing secrets

•    Go

sops is an editor of encrypted files that supports YAML, JSON, ENV, INI and BINARY formats and encrypts with AWS KMS, GCP KMS, Azure Key Vault and PGP.

rage - Simple, modern, and secure file encryption tool, using the age format

•    Rust

rage is a simple, modern, and secure file encryption tool, using the age format. It features small explicit keys, no config options, and UNIX-style composability.

Botan - Crypto library for C++

•    C++

Botan (Japanese for peony) is a cryptography library written in C++11. Botan's goal is to be the best option for cryptography in new C++ code by offering the tools necessary to implement a range of practical systems, such as TLS/DTLS, PKIX certificate handling, PKCS#11 and TPM hardware support, password hashing, and post quantum crypto schemes. In addition to the C++, botan has a C89 API specifically designed to be easy to call from other languages. A Python binding using ctypes is included, and several other language bindings are available.

ObjectivePGP - OpenPGP library for iOS and macOS

•    Objective-C

ObjectivePGP is an implementation of OpenPGP protocol for iOS and macOS. OpenPGP is the most widely used email encryption standard. It is defined by the OpenPGP Working Group of the Internet Engineering Task Force (IETF). Here is the blog post story.

GPG Suite - Everything you need to get started with secure communication and encrypting files in one simple package

•    C

Use GPG Suite to encrypt, decrypt, sign and verify files or messages. Manage your GPG Keychain with a few simple clicks and experience the full power of GPG easier than ever before.

pipethis - Replace your `curl | sh` installers

•    Go

download the binary and drop it in your $PATH.

kbpgp - OpenPGP (RFC4880) Implementation in IcedCoffeeScript

•    Javascript

You can import our keys to GPG - and verify our Keybase.io admin status - with keybase track max and keybase track chris. We appreciate comments, questions, feature requests, etc.

helm-secrets - A helm plugin that help manage secrets with Git workflow and store them anywhere

•    Shell

Wraps the whole helm command. Slow on multiple value files. Run decrypted command on specific value files.

GnuPGNotepad

A notepad based GUI for GnuPG (PGP) which allows you to Encrypt/Decrypt on the fly, or save & load encrypted to disk without using temporary clear text files.

enchive - Encrypted personal archives

•    C

Enchive is a tool to encrypt files to yourself for long-term archival. It's a focused, simple alternative to more complex solutions such as GnuPG or encrypted filesystems. Enchive has no external dependencies and is trivial to build for local use. Portability is emphasized over performance. The name is a portmanteau of "encrypt" and "archive," pronounced en'kīv.

minisign - A dead simple tool to sign files and verify digital signatures.

•    C

Minisign is a dead simple tool to sign files and verify signatures. Minisign uses the EdDSA signature system, and deterministic signature schemes are fragile against fault attacks. However, conducting these requires physical access or the attacker having access to the same physical host.