mystic-crypt is designed as a Java library that can be used for simple and complex encryption and decryption.
The source code for the library is available under https://github.com/astrapi69/mystic-crypt
For demonstration what the library can do there is a graphical client:
The source code for the ui is available under https://github.com/astrapi69/mystic-crypt-ui
CryptoServer is the daemon for handling Sign-Verify, Encryption-Dencryption, Envelop-Openenvelop based on OpenSSL including the SEED symmetric algorithm (Korean Standard Symmetric Algorithm).
It's interface is just tcp/ip socket and very easy to handle
Password Keeper:
Password Keeper will be a program that lets you put all of your passwords in one file and encrypt it easily instead of using a flat file.