Compress Files is an universal program for Mac OS X that enable Mac users to create Zip compressed and encrypted files; XAR archive files, 7zip and 7zip crypted archives, TAR archives; Gzip compressed archives; Bzip2 compressed archives and compressed and encrypted disk images.
What's more Compress Files, let you omit Mac-specific invisible files when creating zip files. Invisible Mac-specific files can be extremely annoying when you transfer Zip files to other systems. Windows and Linux make these files visible and they could create confusion to recipients that receive your files. Compress Files let you specify if you want omit Finder specific information (such as the .DS_Store files) and Mac specific file attributes (such as a resource fork) when creating Zip archives.
For high security, you can use Compress Files to encrypt part of your hard disk through the use of an encrypted disk image protected with a password. You can then also email this disk image to other people who know the password. The image will show up as a volume on your desktop. When your Keychain is locked, or when you send that disk image file to another person, the image is secure. When your Keychain is unlocked, you can copy, move and delete files as you would on any normal hard disk.