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
The JWA library aims to provide a conversion from C to Delphi of as many headers as possible from the PSDK etc. The JWSCL (security library) is an advanced object-oriented framework for programming with the Windows security features (ACL, Tokens, etc.)
File system/directory monitoring utilities with loggin and task processing support (can execute files or make a WCF service call). Multiple configuration options. Source code libraries can be used to create a custom file system monitor.