Software by WinZip Computing:

WinZip, the original and most popular compression utility for Windows, is a powerful and easy-to-use tool that quickly zips and unzips your files to conserve disk space and greatly reduce e-mail transmission time. WinZip seamlessly integrates with Windows and provides AES encryption to keep your files secure. Now available in Standard or Pro, offering new Explorer-style view, CD/DVD burning and Zip task automation. More at www.winzip.com.

WinZip Companion for Outlook makes it easy to zip your e-mail attachments, saving transmission time and disk space for both the sender and recipient. The Companion works the way you want it to; it can automatically zip your attachments, ask whether or not you want them zipped, or let you zip and attach files manually with just a few mouse clicks. And, if your attachments are sensitive, you can easily protect them with advanced AES encryption.