Windows BitLocker - This topic provides a high-level overview of BitLocker, including a list of system requirements, practical applications, and deprecated features.
VeraCrypt - VeraCrypt is a free open source disk encryption software for Windows, Mac OSX and Linux.
SanDisk SecureAccess - SanDisk SecureAccess free download: Data keeper software for Windows. Safe PC download for Windows 32-bit and 64-bit, latest version.
USB Safeguard - Password protection software USB pen drive
Knox - Knox offers easy disk image encryption and comes with a built-in backup service.
Axcrypt - AxCrypt - Password Protect Files With Strong Encryption. AxCrypt is the leading open source file encryption software for Windows.