It's free and installs in seconds.
Command line options for power-users, with seamless integration into shell, advanced encryption, and much more.
For ZIP and GZIP formats, 7-Zip provides a compression ratio that is up to 10% better than the ratio provided by PKZip and WinZip.
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.
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The ultimate open source file archiver for manipulating, packing, and unpacking a host of archive formats.
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