7-Zip是一个开放源码的数据压缩程序，主要用在Microsoft Windows操作系统，Unix-like的操作系统如Linux 与 FreeBSD下面有7-zip的移植版本p7zip可以使用。它提供命令行接口的程序或图形用户界面的程序，而且可以与资源管理器结合。7-Zip 是自由软件，由Igor Pavlov于2000年开始发展，并把主体在GNU LGPL下发布，加密部份使用AES的代码，使用BSD license 发布，解压RAR部分使用RAR特定的许可协议.7-Zip 9.20 Final:
- Some bugs were fixed.

7-Zip 9.20.08 Alpha:
What's new: - 7-Zip now can unpack UEFI BIOS files. - 64-bit version of 7-Zip now includes additional 32-bit shell extension DLL. So other 32-bit programs can call 64-bit 7-Zip via context menu. - Now it's possible to associate 7-Zip with file types without Administrator rights. - New -mf=FilterID switch to specify compression filter. Examples: 7z a -mf=bcj2 a.7z a.tar 7z a -mf=delta:4 a.7z a.wav 7z a -mf=bcj a.tar.xz a.tar - There are some changes in LZMA settings for BCJ2 filter. So compression ratio now is slightly improved for executable files in -mx9 mode for .7z format. - Some bugs were fixed. - New localizations: Corsican, Kyrgyz, Ligurian. What's new in latest alpha update: - 7-Zip now remembers "Show Password" option selection. - The bug in latest alpha versions was fixed: Default solid block size was small (command line version only).

下载:7-Zip 9.20 Final (1.06 MB)
下载:7-Zip 9.20 Final x64 (1.31 MB)
下载:7-Zip 9.20.11 Alpha x86 (1.08 MB)
下载:7-Zip 9.20.11 Alpha x64 (1.37 MB)