Freeware File Encryption
File and Folder Locker
File and Folder Locker is a Free and Portable File and Folder Locking Tool Encryption Tool created by Al Emran Tareq. It can be used to encrypt and password protect files and or folders on your USB Flash Drive Lock Files on USB or any other NTFS Formatted Drive. The File and Folder Locker requires no installation on a PC. It can be run directly from the USB Device.
USB Safeguard - Encryption
USB Encryption: USB Safeguard is a free encryption tool for USB flash drives. It can be used to password protect any files that reside on your USB drive. Simply create a password and then drag and drop files from your flash drive into the Window. To gain access the encrypted files, simply re-enter your password.
Free File Encryption - Androsa File Protector
Androsa File Protector is a professional-grade, standalone freeware file encryption tool that allows users to securely encrypt files using advanced cryptographic algorithms. Designed for simplicity and security, this portable file encryption software requires no installation — making it ideal for protecting sensitive data on the go.