7-zip is an extemely free software for compression and it supports
Packing/Unpacking:7z, ZIP, GZIP, BZIP2 and TAR
Unpacking only: ARJ, CAB, CHM, CPIO, DEB, DMG, HFS, ISO, LZH, LZMA, MSI, NSIS, RAR, RPM, UDF, WIM, XAR and Z.
Its free package and needs no installation.You have to just select a folder where it has to be placed and click on the 7-zip icon.No installation required and is a portable version and can be carried in your pen drive and in the browsing centres where you cant install softwares......Here is the link,Download and enjoy Download,Please click here
