Free portable cross-platform graphical multi-user password manager
Provides encryption & password hashing for your app or Hibernate POJOs
Centralized signing and verification
HOFAT - graphical Hash Of File And Text calculator, 100%-pure Java
Anoncrypt-Text Encryption and Decryption Website in Java(Struts2)
Java code that enables you to sign documents using a smart card.
A simple example of polyalphabetic cipher in Java.