For ZIP and GZIP formats, 7-Zip provides a compression ratio that is 2-10 % better than the ratio provided by PKZip and WinZip
Strong AES-256 encryption in 7z and ZIP formats
Self-extracting capability for 7z format
Integration with Windows Shell
Powerful File Manager
Powerful command line version
Plugin for FAR Manager
Localizations for 87 languages
Notes
The installer for 7-Zip is known to close the explorer process.
This means you may lose current work. If it doesn't automatically restart explorer, type explorer on the command shell to restart it.