7-Zip - архиватор с cравнительно высокой степенью сжатия. Поддерживает ZIP, 7z, RAR, CAB, GZIP, BZIP2 и TAR архивы. Компрессия на 2-10% больше, чем у PKZip и WinZip. Высокая скорость. Есть версия 7-Zip для командной строки и плагин для FAR Manager.
Изменения в программе 7-Zip 9.30 alpha (26-10-2012):
The BUG in 7-Zip 9.26 alpha - 9.29 alpha versions was fixed. These alpha versions could not open non-solid 7z archive, if some files were skipped during creation of that archive. That problem is also related to 7z archives created in solid mode, if each solid block contains no more than one file. Note: 7-Zip skips files that were open for writing by another application and shows warning in that case.
Изменения в программе 7-Zip 9.22 beta (18-04-2011):
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.