7-Zip is a file archiver with a high compression ratio. The main features of 7-Zip:
Highest 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, 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 Manager Localizations for 47 languages works in DOS using HX Extender There is port of command line version for DOS, Linux/Unix.
What's New in version 4.63:
7-Zip now can unpack ZIP archives encrypted with PKWARE-AES. Some bugs were fixed.
OS: Win 98/ME/NT/2K/XP
Source: http://www.7-zip.org/