7-Zip is a file archiver with the high compression ratio. The program supports 7z, ZIP, CAB, RAR, ARJ, LZH, CHM, GZIP, BZIP2, Z, TAR, CPIO, RPM and DEB formats. Compression ratio in the new 7z format is 30-50% better than ratio in ZIP format.

7-Zip是一款壓縮比很高的壓縮軟件，支持的壓縮及解壓縮格式也是現在比較流行的格式。在保證壓縮質量的情況下給您帶來的是更高的壓縮比。支持格式： 壓縮及解壓縮：7z、ZIP、GZIP、BZIP2 和 TAR。僅解壓縮：RAR、CAB、ISO、ARJ、LZH、CHM、Z、CPIO、RPM、DEB 和 NSIS 。對于 ZIP 及 GZIP 格式，7-Zip 能提供比使用 PKZip 及 WinZip 高 2-10% 的壓縮比。7z 格式支持創建自釋放(SFX)壓縮檔案。

The main features of 7-Zip

* High compression ratio in new 7z format with LZMA compression
* Supported formats:
- Packing / unpacking: 7z, ZIP, GZIP, BZIP2 and TAR
- Unpacking only: RAR, CAB, ISO, ARJ, LZH, CHM, Z, CPIO, RPM, DEB and NSIS
* 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 63 languages

Changes:

- New fast compression mode for Deflate method in Zip and GZip.
- New "Compress shared files" option in GUI and -ssw switch.
- Some bugs were fixed.
- New localization: Norwegian Nynorsk

Download: 7-Zip 4.45 官方簡體中文版
Download: 7-Zip 4.46 Beta