Encrypto - Encrypto lets you encrypt files before sending them to friends or coworkers.
SensiGuard - Use SensiGuard file encryption software to lock and encrypt files and folders on your Windows XP, Windows Vista or Windows 7 PC or any USB flash drive
File Lock PEA - Password-encryption of files and directories. File PEA encrypts files and folders with authenticated encryption to protect confidentiality and integrity. The program uses memory-hard key derivation functions to prevent custom hardware attacks.
Cypherix Secure IT - Secure IT File Encryption, Folder Encryption Software to encrypt, compress any data, any file, folder on any Windows PC.
EncFSMP - EncFSMP, a program to mount EncFS folders on Windows and OS X.
GPGTools - Use GPG Suite to encrypt, decrypt, sign and verify files or messages.