GnuPG for Windows
Complete and free implementation of the OpenPGP standard
A simple, modern and secure encryption tool (and Go library)
Secure software enclave for storage of sensitive information in memory
Keyper by Jarrid is a suite of crypto key management APIs
End-to-end encrypted cloud for photos, videos and 2FA secrets
Keybase Go library, client, service, OS X, iOS, Android, Electron
AWS Encryption SDK
A beginner-friendly Python CLI tool that audits website cookies.
Secure communication software
Secure Communications Starts Here.
Petoron Quantum Standard (PQS)
Powerful webdav client and sync tools with client-side AES encryption
Open-source PureBasic implementation of the Shamir Secret Sharing
SuProtection , secure file encryption and password manager
STROBE cryptographic protocol framework
File Encryption/Decryption using password
Stanford Javascript Crypto Library
FIDO strong authentication, encryption, digital signature engine
A Collection of Useful Java/Swing Code
Secure mail + Tor gateway
Simple but Powerful, Cross-Platform Password Management Utility
A family of small-state CSPRNGs and Stream Ciphers