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7-Zip is a file archiver and open source software. No need to buy any software from now to unzip your files or even downloads the trail version of WinZip. It does everything for you without paying a single penny:

Supports many formats: Packing / unpacking: 7z, ZIP, GZIP, BZIP2 and TAR Unpacking only: ARJ, CAB, CHM, CPIO, DEB, DMG, HFS, ISO, LZH, LZMA, MSI, NSIS, RAR, RPM, UDF, WIM, XAR and Z.

Fast.
Free and open source.
High compression ratio.
Works best with Windows operating systems.

• High compression ratio in new 7z format with LZMA compression
• Supported formats:
• Packing / unpacking: 7z, ZIP, GZIP, BZIP2 and TAR
• Unpacking only: ARJ, CAB, CHM, CPIO, DEB, DMG, HFS, ISO, LZH, LZMA, MSI, NSIS, RAR, RPM, UDF, WIM, XAR and Z.
• For ZIP and GZIP formats, 7-Zip provides a compression ratio that is 2-10 % better than the ratio provided by PKZip and WinZip
• Strong AES-256 encryption in 7z and ZIP formats
• Self-extracting capability for 7z format
• Integration with Windows Shell
• Powerful File Manager
• Powerful command line version
• Plug in for FAR Manager
• Localizations for 74 languages
  
  7-Zip works in Windows 7 / Vista / XP / 2008 / 2003 / 2000 / NT / ME / 98. There is a port of the command line version to Linux/Unix.
• Want to download the 7-zip click here to go official website or you can click here
  Download