A dead simple tool to sign files and verify digital signatures
Open-source implementation of a substantial portion of the API
A Free, Easy-to-Use, Cross-Platform OpenPGP Crypto Tool.
cross-platform (Java) file encryption and archiving tool
Free portable cross-platform graphical multi-user password manager
cross-platform, encryption application
A cross-platform crypto-steganography toolkit
Petoron Quantum Standard (PQS)
Free and open-source PDF signing and verification application.
antigift is simple cross-platform, files & folders encryption tool
yubikey-agent is a seamless ssh-agent for YubiKeys
A library that provides cryptographic APIs that are easy and secure
FinalCrypt - Unbreakable One-Time Pad Encryption
HOFAT - graphical Hash Of File And Text calculator, 100%-pure Java
AES Cipher, Base64 encoder, SHA calculator
Base64 encode (or decode) files of any type with this lightweight tool
GILIB Large Integer Arithmetic Library
[WARNING] Project has moved to http://github.com/Retroshare/Retroshare
Compiled into a single .jar file. Tiny Password Manager. Portable
Simple but Powerful, Cross-Platform Password Management Utility