LAN Messenger - LAN Messenger is a decentralized UDP IM-style chat client which supports usernames...
VeraCrypt - VeraCrypt is a free open source disk encryption software for Windows, Mac OSX and Linux.
MyChat - Secure instant messenger for any network
Axcrypt - AxCrypt - Password Protect Files With Strong Encryption. AxCrypt is the leading open source file encryption software for Windows.
BORGChat - BORGChat is a LAN messaging software program.
Windows BitLocker - This topic provides a high-level overview of BitLocker, including a list of system requirements, practical applications, and deprecated features.