VeraCrypt - VeraCrypt is a free open source disk encryption software for Windows, Mac OSX and Linux.
Puff - Puff is a secure proxy software & service, it is provided AS IS without any warranty
Axcrypt - AxCrypt - Password Protect Files With Strong Encryption. AxCrypt is the leading open source file encryption software for Windows.
GAppProxy - GAppProxy is an open source HTTP Proxy software runs on Google App Engine.
Windows BitLocker - This topic provides a high-level overview of BitLocker, including a list of system requirements, practical applications, and deprecated features.
XX-Net - XX-Net is GoAgent with improvements.