yubikey-agent is a seamless ssh-agent for YubiKeys
SHA-256 Algorithm Implementation in C
Mkpass - Command line Secure Password Generator
A command line interface for encryption and decryption using the NTRU
FinalCrypt - Unbreakable One-Time Pad Encryption
A library for easy use of symmetric encryption and decryption in java
Sampling exactly from the normal and exponential distributions
Command Line File Encrypter / Decrypter, Using AES256-CBC Cryptography
Java Encryption Utility.
Cryptographically secure random password/passphrase generator
GILIB Large Integer Arithmetic Library
Utility to generate and verify checksums/hashes
One-time-pad encryption using a virtual pad
A command-line utility for calculating and verifying file checksums.
Support Tools for OpenSSH with multiple agents
PKI & Card Management System to issue and manage tokens & certificates
The Remarc Mobile-ID USAT applet