JCryptor is an encrypting tool based on the Caesar-cipher.
Fileprivacy easily encrypts your files
Simple Java Encryption Library
A simple example of polyalphabetic cipher in Java.
A Java application for transferring computer files in 5 letter groups
Encrypt a text through a list of encryption methods
jEncrypt is a command line file encryption archiver
Simple and easy to use Java application to encrypt your files
textcrypter is an encryption tool using vigenere cipher algorithm
Java Library to generate license for your application.
rsa-elgamal comparison
Kerberized Messaging Toolkit for Java
TCP/IP API (SSL Encryption, ZLIB Compression)