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 for 32-bit Windows:
http://sourceforge.net/projects/sevenzip/files/7-Zip/9.22/7z922.exe/download
7-Zip for 64-bit Windows x64:
http://sourceforge.net/projects/sevenzip/files/7-Zip/9.22/7z922-x64.msi/download
What's new:
- 7-Zip now uses progress indicator displayed on a taskbar button under Windows
7.
- The BUG in 7-Zip 9.21 beta was fixed:
7-Zip could ignore some options when you created ZIP archives.
For example, it could use ZipCrypto cipher instead of AES-256.
http://sourceforge.net/projects/sevenzip/files/7-Zip/9.22/7z922.exe/download
7-Zip for 64-bit Windows x64:
http://sourceforge.net/projects/sevenzip/files/7-Zip/9.22/7z922-x64.msi/download
What's new:
- 7-Zip now uses progress indicator displayed on a taskbar button under Windows
7.
- The BUG in 7-Zip 9.21 beta was fixed:
7-Zip could ignore some options when you created ZIP archives.
For example, it could use ZipCrypto cipher instead of AES-256.