7-Zip is a file archiver with a high compression ratio.
The main features of 7-Zip are:
High compression ratio in new 7z format with LZMA compression
Supported packing / unpacking formats: 7z, ZIP, GZIP, BZIP2 and TAR
Supported formats for unpacking only: ARJ, CAB, CHM, CPIO, DEB, DMG, HFS, ISO, LZH, LZMA, MSI, NSIS, RAR, RPM, UDF, WIM, XAR and Z.
Strong AES-256 encryption in 7z and ZIP formats
Self-extracting capability for 7z format
Integration with Windows Shell
Powerful File Manager