The Stanford Javascript Crypto Library is a project by the Stanford Computer Security Lab to build a secure, powerful, fast, small, easy-to-use, cross-browser library for cryptography in Javascript. SJCL is secure. It uses the industry-standard AES algorithm at 128, 192 or 256 bits; the SHA256 hash function; the HMAC authentication code; the PBKDF2 password strengthener; and the CCM and OCB authenticated-encryption modes.

sjcl - Stanford Javascript Crypto Library

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. 

OpenPGP.js - OpenPGP implementation for JavaScript

cryptography is a package which provides cryptographic recipes and primitives to Python developers. Our goal is for it to be your "cryptographic standard library". It supports Python 2.7, Python 3.4+, and PyPy 5.3+. cryptography includes both high level recipes and low level interfaces to common cryptographic algorithms such as symmetric ciphers, message digests, and key derivation functions. For example, to encrypt something with cryptography's high level symmetric encryption recipe.

Cryptography - Package designed to expose cryptographic primitives and recipes to Python developers

Firefox Send lets you share files with end-to-end encryption and a link that automatically expires. This helps to keep your stuff private and make sure it does not stay online forever.

Firefox Send - Simple, private file sharing

Rclone ("rsync for cloud storage") is a command line program to sync files and directories to and from different cloud storage providers like Google Drive, S3, Dropbox, Backblaze B2, One Drive, Swift, Hubic, Wasabi, Google Cloud Storage, Yandex.

Rclone - rsync for cloud storage like Google Drive, S3, Dropbox, Backblaze B2, One Drive, Swift, Hubic, Wasabi, Google Cloud Storage, Yandex Files 

Gpg4win (GNU Privacy Guard for Windows) is encryption software for files and emails. Gpg4win supports both relevant cryptography standards, OpenPGP and S/MIME (X.509), and is the official GnuPG distribution for Windows. It is maintained by the developers of GnuPG. 

Gpg4win - GnuPG for Windows

Bouncy Castle Crypto APIs is a lightweight cryptography API for Java and CSharp. It has provider for the Java Cryptography Extension and the Java Cryptography Architecture. It supports TLS, PKCS7, PKCS12, OpenPGP, S/MIME, OCSP, TSP, CMP, Extended Access Control, ASN and lot more.

BouncyCastle - Lightweight Cryptography API for Java and CSharp

BorgBackup (short: Borg) is a deduplicating backup program. Optionally, it supports compression and authenticated encryption. The main goal of Borg is to provide an efficient and secure way to backup data. The data deduplication technique used makes Borg suitable for daily backups since only changes are stored. The authenticated encryption technique makes it suitable for backups to not fully trusted targets.

Borg - Deduplicating archiver with compression and authenticated encryption

RxDB is a realtime Database for the Web. It is reactive data-handling based on RxJS. It helps App to work even without internet. It supports Mango-Query, Encryption, Import/Export of database and lot more.

RxDB - A realtime Database for the Web

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.


age - A simple, modern and secure encryption tool

Cryptomator offers multi-platform transparent client-side encryption of your files in the cloud. Most cloud providers encrypt data only during transmission or they keep the keys for decryption for themselves. These keys can be stolen, copied, or misused. With Cryptomator, the key to your data is in your hands. Cryptomator encrypts your data quickly and easily. Afterwards you upload them protected to your favorite cloud service.
 
It works with Dropbox, Google Drive, OneDrive, MEGA, pCloud, ownCloud, Nextcloud and any other cloud storage service which synchronizes with a local directory. It uses AES encryption with 256-bit key length.

Cryptomator offers multi-platform transparent client-side encryption of your files in the cloud. Most cloud providers encrypt data only during transmission or they keep the keys for decryption for themselves. These keys can be stolen, copied, or misused. With Cryptomator, the key to your data is in your hands. Cryptomator encrypts your data quickly and easily. Afterwards you upload them protected to your favorite cloud service.



Cryptomator - Multi-platform transparent client-side encryption of your files in the cloud

With the rise of government surveillance programs, Tox, a FOSS initiative, aims to be an easy to use, all-in-one communication platform that ensures full privacy and secure message delivery. Tox must use UDP simply because hole punching with TCP is not as reliable. However, Tox does use TCP relays as a fallback if it encounters a firewall that prevents UDP hole punching.
 
It helps to chat instantly across the globe with Tox's secure messages. It supports Encrypted voice calls, Screen sharing, File sharing, Video calls, Share with group or team. Tox has no central servers that can be raided, shut down, or forced to turn over data — the network is made up of its users.

With the rise of government surveillance programs, Tox, a FOSS initiative, aims to be an easy to use, all-in-one communication platform that ensures full privacy and secure message delivery. Tox must use UDP simply because hole punching with TCP is not as reliable. However, Tox does use TCP relays as a fallback if it encounters a firewall that prevents UDP hole punching.

Tox - The future of online communications.

CyberChef is a simple, intuitive web app for carrying out all manner of "cyber" operations within a web browser. These operations include simple encoding like XOR or Base64, more complex encryption like AES, DES and Blowfish, creating binary and hexdumps, compression and decompression of data, calculating hashes and checksums, IPv6 and X.509 parsing, changing character encodings, and much more.
 
The tool is designed to enable both technical and non-technical analysts to manipulate data in complex ways without having to deal with complex tools or algorithms. It was conceived, designed, built and incrementally improved by an analyst in their 10% innovation time over several years.

CyberChef is a simple, intuitive web app for carrying out all manner of "cyber" operations within a web browser. These operations include simple encoding like XOR or Base64, more complex encryption like AES, DES and Blowfish, creating binary and hexdumps, compression and decompression of data, calculating hashes and checksums, IPv6 and X.509 parsing, changing character encodings, and much more.

CyberChef - The Cyber Swiss Army Knife for Developers (DevToolbox)

Jasypt is a java library which allows the developer to add basic encryption capabilities to his/her projects with minimum effort, and without the need of having deep knowledge on how cryptography works. It provides unidirectional (digest) and bidirectional encryption techniques. It could encrypt text, byte arrays, objects, files etc. It could be integrated with Spring, Apache wicket.

Jasypt - Java Simplified Encryption

Enigmail is a security extension to Mozilla Thunderbird and Seamonkey. It enables you to write and receive email messages signed and/or encrypted with the OpenPGP standard. Sending and receiving encrypted and digitally signed email is simple using Enigmail. It supports powerful GUI for easy configuration and OpenPGP key management, Integrated OpenPGP PhotoID viewer and lot more.

Enigmail - A simple interface for OpenPGP email security

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