1)   Hexprobe Storage Encryption Tool 2.1
A simple, easy to use disk encryption tool that encrypts and password protects your removable and external disk. Its powerful encryption ensures that only you can open an encrypted logical drive.
disk encryption, usb encryption, partition encryption, disk protect, password protect, 128-bit AES algorithm,

 2)   Cryptainer LE Free Encryption Software 9.2.0
Encrypt any file or folder on any Windows PC. Any Media, any type of data. Cryptainer LE Free Encryption Software. Password protect any file or folder with strong Encryption. Send secure e-mail. Protects data on USB Drives, CDs and HDDs. Freeware.
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 3)   SensiGuard 3.3.1
SensiGuard file encryption software is packed with powerful features like file and folder locking, usb flash drive protection and permanent file deletion. SensiGuard encrypts your most sensitive data on any PC running Windows XP,Vista or Windows 7.
lock folder, folder vault, lock file, file lock, folder locking, file locking, file encryption, encrypt file, windows encryption, password protect USB flash drive,

 4)   DeviceShield 1.4.0
Deviceshield acts as firewall that works on the INSIDE to control access to ALL Removable Media Devices. It protects your data from inside security breaches by removeable media devices such as USB memory sticks, CD/DVD drives, Firewire etc.
USB security, Eendpoint Security, USB Encryption, Device Security,