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. The main features of 7-Zip: High compression ratio in new 7z format with LZMA compression. Supported formats: Packing / unpacking: 7z, ZIP, GZIP, BZIP2 and TAR; Unpacking only: RAR, CAB, ISO, ARJ, LZH, CHM, MSI, WIM, Z, CPIO, RPM, DEB and NSIS. 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. Version 4.57 supports WinZip-compatible AES-256 encryption for .ZIP archives and 7-Zip can unpack MSI and WIM archives now. Also there are some speed optimizations.

7-Zip features:

• 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
• 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

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