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1999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://dl.7-zip.org/7z924.exe
or
http://dl.7-zip.org/7z924.msi
7-Zip for 64-bit Windows x64:
http://dl.7-zip.org/7z924-x64.msi
What's new:
- LZMA decompression speed was improved.
- "compress and send to email" code was improved to support more email clients.
- New command "h" to calculate hash values CRC-32, CRC-64, SHA-256 or SHA-1 for files on disk.
http://dl.7-zip.org/7z924.exe
or
http://dl.7-zip.org/7z924.msi
7-Zip for 64-bit Windows x64:
http://dl.7-zip.org/7z924-x64.msi
What's new:
- LZMA decompression speed was improved.
- "compress and send to email" code was improved to support more email clients.
- New command "h" to calculate hash values CRC-32, CRC-64, SHA-256 or SHA-1 for files on disk.