7-Zip is open source software. The main features of 7-Zip; high compression ratio in new 7z format with LZMA compression. supported formats include packing and unpacking: 7z, ZIP, GZIP, BZIP2, and TAR, unpacking only of ARJ, CAB, CHM, CPIO, DEB, DMG, HFS, ISO, LZH, LZMA, MSI, NSIS, RAR, RPM, UDF, WIM, XAR, and Z. For ZIP and GZIP formats, 7-Zip provides a compression ratio. Strong AES-256 encryption in 7z and ZIP formats. Self-extracting capability for 7z format. Integration with Windows Shell. Powerful File Manager and command line version. Plugin for FAR Manager, and Localizations for 74 languages.