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An open-source Delphi program that locks your Windows system if your Bluetooth phone or device is out of range.
Cryptographic text editor based on OrdoEmacs. Includes Delphi source. Freeware with nice simple interface. Encrypt to file or to/from clipboard.
An open-source Delphi program that detects webcam movement and can lock your PC, play a sound, save JPG images to disk and email or FTP them to your account. You can also set up a monitoring zone within the screen.
Chat over TCPIP using an utterly paranoid level of encryption. Uses ridiculously long AES and RSA keys, all automatically generated. Nice simple interface and source included. Java and Windows versions available.