7-Zip

2008年1月12日 (六) 19:40的版本

7-Zip is a file archiver with a high compression ratio.

7-Zip is open source software. Most of the source code is under the GNU LGPL license. The unRAR code is under a mixed license: GNU LGPL + unRAR restrictions.

main features of 7-Zip:

• High compression ratio in new 7z format with LZMA compression
• Supported formats:

         o Packing / unpacking: 7z, ZIP, GZIP, BZIP2 and TAR
         o Unpacking only: RAR, CAB, ISO, ARJ, LZH, CHM, MSI, WIM, Z, CPIO, RPM, DEB and NSIS

• For ZIP and GZIP formats, 7-Zip provides a compression ratio that is 2-10 % better than the 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 69 languages

main features of 7z format:

• Open architecture
• High compression ratio
• Strong AES-256 encryption
• Ability to use any compression, conversion or encryption method
• Supports files with sizes up to 16000000000 GB
• Unicode file names
• Solid compression
• Archive header compression

main features of LZMA:

• High compression ratio
• Variable dictionary size (up to 4 GB)
• Compression speed: about 1 MB/s on 2 GHz CPU
• Decompression speed: about 10-20 MB/s on 2 GHz CPU
• Small memory requirement for decompression (depend from dictionary size)
• Small code size for decompression: about 5 KB
• Supports multi-threading and P4's hyper-threading

Links

• http://www.7-zip.org/