7-Zip is better than Winzip and Winrar

7-Zip is a file archiver with a high compression ratio.
First and foremost thing is that its free.

* 7z archives were up to 40 percent smaller then their ZIP equivalents, although compression did take longer, and the highest compression settings can hog system resources.

* It's not hard to use and fairly self-explanatory

* Also it extracts those formats as well as others. It works on Windows, Linux, and Mac OSX.

Its main features are:
* High compression ratio in new 7z format with LZMA compression
* Supported formats:

* Packing / unpacking: 7z, ZIP, GZIP, BZIP2 and TAR
* Unpacking only: RAR, CAB, ISO, ARJ, LZH, CHM, Z, CPIO, RPM, DEB and NSIS



Self-extracting capability for 7z format
* Integration with Windows Shell
* Powerful File Manager
* Powerful command line version
* Plugin for FAR Manager
* Localizations for 63 languages