7-Zip Archiver (Open source & widely used)

7-Zip (a real alternative of Winzip and Winrar) is open source software which works in Windows 7 / Vista / XP / 2008 / 2003 / 2000 / NT / ME / 98. Use this free soft to compress or decompress your files in all the extentions (eg. .zip, .rar, .tar, .cab etc...).

There is a port of the command line version to Linux/Unix. Compression ratio results are very dependent upon the data in the file. Usually, 7-Zip compresses to 7z format 30-70% better than to zip format. And 7-Zip compresses to zip format 2-10% better than most of other zip compatible programs.


The main features of 7-Zip:

• High compression ratio in 7z format with LZMA and LZMA2 compression
• Supported formats: (Packing / unpacking: 7z, XZ, BZIP2, GZIP, TAR, ZIP and WIM, Unpacking only: ARJ, CAB, CHM, CPIO, CramFS, DEB, DMG, FAT, HFS, ISO, LZH, LZMA, MBR, MSI, NSIS, NTFS, RAR, RPM, SquashFS, UDF, VHD, 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
• Plugin for FAR Manager
• Localizations for 79 languages

Download link :

http://downloads.sourceforge.net/sevenzip/7z920.exe (.exe, 32-bit x86)
http://downloads.sourceforge.net/sevenzip/7z920-x64.msi (.msi, 64-bit x64)

Official Web: http://www.7-zip.org/