7-Zip

7-Zip is free software with open source. The most of the code is under the GNU LGPL license. Some parts of the code are under the BSD 3-clause License. Also there is unRAR license restriction for some parts of the code. Read 7-Zip License information.

You can use 7-Zip on any computer, including a computer in a commercial organization. You don't need to register or pay for 7-Zip.
The main features of 7-Zip

    High compression ratio in 7z format with LZMA and LZMA2 compression
    Supported formats:
        Packing / unpacking: 7z, XZ, BZIP2, GZIP, TAR, ZIP and WIM
        Unpacking only: APFS, AR, ARJ, CAB, CHM, CPIO, CramFS, DMG, EXT, FAT, GPT, HFS, IHEX, ISO, LZH, LZMA, MBR, MSI, NSIS, NTFS, QCOW2, RAR, RPM, SquashFS, UDF, UEFI, VDI, VHD, VHDX, VMDK, XAR and Z.
    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