7-zip is a file archiver that supports a wide range of file formats, including ZIP, CAB, ISO and RAR, it’s an open source free software, and does everything that you expect, if you are hunting for a freeware alternative to WinZip or WinRAR, just check out 7-zip!
7-zip can decompress ZIP files or RAR files for you, moreover, it could compress files or folders to the following formats: 7z, ZIP, GZIP, BZIP2 and TAR, and it provides a very high compression ratio, with the Ultra compression level, a text file can be packed into only 5 to 10 percent of the original size, you won’t believe it!
Here are some highlights of 7-Zip:
* 32-Bit and 64-Bit version available.
* Strong AES-256 encryption in 7z and ZIP formats.
* Integration with Windows Shell.
* Localizations for 74 languages.
* 7-Zip works in Windows 7 / Vista / XP / 2008 / 2003 / 2000 / NT / ME / 98.
* Supported formats:
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.
Download 7-zip here: http://www.7-zip.org/download.html