yubikey-agent is a seamless ssh-agent for YubiKeys
C++ cryptographic library (modern hash functions, ciphers, KDFs)
OpenSC - tools and libraries for smart cards
SHA-256 Algorithm Implementation in C
Linux encrypted filesystem management tool
Cipherbox is a vault that utilizes six encryption algorithms.
Mkpass - Command line Secure Password Generator
A command line interface for encryption and decryption using the NTRU
File checksum generator and verifier.
Amazon DynamoDB Encryption Client for Java
GUI tool for administration of PKCS#11 enabled devices
Just A Few Clicks To Encrypt Your File
Centralized signing and verification
Halimede Certificate Authority
Encryption/Decryption demonstration app using the S-DES algorithm
Easy create and sign x509 certificates and generate RSA key pairs
Decrypt encryptions without knowing the key or cipher
Easy to use PKI library
AVR based smartcard/token with ECC and RSA cryptography
A library for easy use of symmetric encryption and decryption in java