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.

7-Zip Main Feature:

• * High compression ratio in new 7z format with LZMA compression.
• * 7-Zip is free software distributed under the GNU LGPL.
• * Supported formats: 7z, ZIP, CAB, RAR, ARJ, GZIP, BZIP2, Z, TAR, CPIO, RPM and DEB.
• * For ZIP and GZIP formats 7-Zip provides compression ratio that is 2-10 % better than ratio provided by PKZip and WinZip
• * Self-extracting capability for 7z format
• * Integration with Windows Shell
• * Powerful File Manager
• * Powerful command line version
• * Plugin for FAR Manage
• * Localizations for 55 languages

• * The BUG in command line version was fixed: -up3 switch could work incorrectly.