Bigspeedsoft.com - highly optimized, high speed implementations of the zip data compression technology for both end-users and developers
Info-zip.org - Providing free, portable, high-quality versions of the Zip and UnZip compressor-archiver utilities that are compatible with the DOS-based PKZIP by PKWARE, Inc.
TurboZIP - is a Total Archive and E-mail Management, and Auto Backup tool that offers an amazing depth of features, with an interface that is easily accessible to every level of user.
MaX Compression - automatically and invisibly zips and unzips attachments sent/received so reducing network loadings, remote user access requirements and storage demands.