dsCrypt 

dsCrypt is AES/Rijndael file encryption software with simple, multi-file, drag-and-drop operations. It features optimal implementation, performance, safety measures and offers unique options for enhanced security.
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MadLogic Encryptor 

MadLogic Encryptor, encrypt files for privacy; encrypted files are self-extracting; download the demo for free.
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NCrypt 

NCrypt is a quick and easy way to protect sensitive files through data encryption and password protection. NCrypt supports RC, DES and DES3 encryption standards for various levels of protection. Secure passwords make files even harder to crack .
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Encrypt Easy 

Encrypt Easy is a highly secure file encryption program enabling fast and simple one-click encryption and decryption of single files, folders and entire directory trees using most secure algorithms. It also features shredder and wipe-out utilities.
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EDCrypt 

EDCrypt is an ActiveX control performing following functions: - encrypts and decrypts data using 6 strong symmetrical block ciphers - computes message digests of data using 18 hashing algorithms - securely shreds files
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Encryption Workshop 

Currently nine strong symmetrical block ciphers are implemented: BLOWFISH, GOST, RC 4, DES, Skipjack, TWOFISH, TEA and XOR. Any type of file can be encrypted/decrypted, not only ZIP files.
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