For Windows users who have been using Pkzip or the Winzip utilities for years, you should consider using 7zip. I’ll tell you why. First of all, it’s open source. It can’t get any better than that.
It can pack and unpack ZIP, GZIP, BZIP2 and TAR formats. It can unpack the following: ARJ, CAB, CHM, CPIO, DEB, DMG, HFS, ISO, LZH, LZMA, MSI, NSIS, RAR, RPM, UDF, WIM, XAR and Z. The 7Z format has the highest compression ratio of any packing utility out there. It has a compression ratio of 2-10% better than the ratio provided by Pkzip and Winzip. It also comes with a strong AES-256 encryption in 7z and ZIP formats.
In addition, it has a powerful File Manager, a powerful command line version, and a plugin for the Far Manager. If that’s not enough, it is also available in 74 languages. Download 7zip and give it a try.