7-Zip是一款GNU/LPGL协议下分发的免费软件,可以说是目前最有希望成为zip、rar之后的下一个主流压缩格式的文件压缩格式了.7zip的 压缩率是他最大的竞争优势,在选择普通压缩率的情况下我们已经可以轻松击败WinRAR的最高压缩率了.但是7zip也不完美(要是完美了,RAR就已经 被取代了),主要是软件的界面依然不够优秀,格式本身对于分卷压缩的支持也不好,但是这不妨碍7zip成为最有潜力的压缩格式.下载: 7-Zip 4.59 Beta

7-Zip 4.59 beta was released. 
 
What's new after 7-Zip 4.58 beta: 
- 7-Zip now can unpack UDF, XAR and DMG/HFS archives. 
- 7-Zip File Manager now keeps encryption when you edit encrypted file inside archive. 
- 7-Zip File Manager now allows to change current folder from the address bar drop-down list. 
- It's allowed to use -t switch for "list" and "extract" commands. 
- Some bugs were fixed. 
- New localizations: Icelandic, Kurdish Sorani.