Aladdin StuffIt Express Enterprise Edition for Mac

From Allume Systems:

StuffIt Express is a business productivity tool designed to save companies time and money by automating secure data delivery as well as routine tasks such as data backups. With easy-to-use wizards, users set up customer-specific "Express Boxes" that handle all aspects of data delivery, including data compression, encryption, uploading to password-protected FTP sites, and emailing notification of task completion. Express boxes can also be set up and provided to customers so that sending files to the business is convenient and simple. StuffIt Express requires no knowledge of code or scripting. Using StuffIt Express-created drop boxes will guarantee error-free file transfers every time.