***COMPRESSION & BACKUP***

7-Zip is an open source file archiver predominantly for the Microsoft Windows operating system. It operates either as a command line program or with a graphical user interface. It also features integration with the Windows shell environment. 7-Zip is free software, distributed under the GNU LGPL license. download

WinRAR is a powerful archive manager. It can backup your data and reduce size of email attachments, decompress RAR, ZIP and other files downloaded from Internet and create new archives in RAR and ZIP file format. download

WinZip is the original Windows Zip file utility. Combining power and flexibility with ease of use, WinZip appeals to the entire spectrum of data-compression users. First-time users are comfortable with the intuitive WinZip Wizard, while power users appreciate WinZip's seamless Windows Explorer interface and choose the award-winning WinZip Classic interface for their most sophisticated compression needs. In addition to basic zipping and unzipping, features include tight integration with Windows Explorer, support for most Internet file formats, advanced AES encryption, and much more. download