7-Zip
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Version: 4.58 Beta Release
Date: Tuesday, May 06, 2008
User Rating: 8.0    your rating12345678910
Size: 854 KB
Download: Click Here
Description: An open source compression utility that supports the new 7z format with LZMA compression and much more
What's New: Speed optimizations, 64-bit Windows support, AES-256 encryption for ZIP archives...  more»
Platforms: Windows 2000, Windows 2003, Windows 98, Windows ME, Windows NT, Windows Vista, Windows XP
Company: Igor Pavlov - About 7-Zip
Status: Freeware (open source) - donations encouraged. Latest official release - 4.57 - also available

The freeware (open source) 7-Zip is a powerful new compression tool that offers full support for the new 7z format with LZMA compression in addition to support for a wide array of existing formats, including ZIP, GZIP, BZIP2, TAR, RAR, CAB, ISO, ARJ, LZH, CHM, Z, CPIO, RPM, DEB and NSIS. 7-Zip also claims to provide compression ratios that are 2% - 10% better than the ratios provided by PKZip and WinZip.