SPac is an easy to use, secure, and powerful application for file encryption and sharing. SPac combines both compression and encryption into the one product and utilizes a user-friendly interface to make manipulating your secure archives simple.
Kremlin Encrypt
Kremlin provides a cross-platform security suite for Mac and PC, protecting your sensitive information from intruders. It features RC4 and Blowfish encryption, secure deletion of files and records of all your activities, and more!
Crypt4Free
Crypt4Free (freeware) is files encryption software with ability to encrypt files and text messages. Support for ZIP files and ability to secure delete sensitive files. Skinnable user friendly interface.
Advanced Encryption Package 2006 Professional
AEP2006 PRO's most noteworthy feature may be its flexibility and military grade encryption: program includes 17 encryption algorithms (Rijndael, TWOFISH, BLOWISH, CAST, MARS, TEA, etc) to encrypt your files. It also includes file shredder. RSA supp.
PDF Encrypt COM/SDK Unlimited License
PDF Encrypt allows you to encrypt (using standard 40-bit or 128-bit supported by Acrobat Reader 5.0 and up) existing PDFs, set permissions, add user and owner password.
Safe'n'Sec
Safe'n'Sec - effective and easy-to-use utility to protect a personal computer against unknown system vulnerabilities and newly discovered threats.