UkeySoft USB Encryption - Password Protect Lock your USB Disk, flash drive, memory stick
VeraCrypt - VeraCrypt is a free open source disk encryption software for Windows, Mac OSX and Linux.
QuickCrypto - QuickCrypto is advanced encryption program designed for the encrypting the personal data stored in the internal and removable drives.
Easy Vault - Easy Vault: Hide Pictures, Videos, Gallery, Files is an all-in-one privacy protection application designed for those who want to lock and hide their private files.
BoxWrap - Encrypts and protects your files on your machine, before they hit your disk and the cloud:...
Windows BitLocker - This topic provides a high-level overview of BitLocker, including a list of system requirements, practical applications, and deprecated features.