-> If you're looking just to unzip archives, ExtractNow is an excellent free option. Otherwise, 7Zip is one of the leading freeware candidates.
-> WinZIP and WinRAR are competing programs...you only need to choose one. WinZIP has additional functionality (such as 256-bit encryption and direct CD/DVD burning of ZIP files) but WinRAR has greater support of archive formats.
-> You can download the full versions by purchasing them from the respective companies.
Hope this helps,
Do these two softwares have any free substitute(full versions) which do the same kind of stuff?if there are,which one would be the best?and if not,would there be a place where i can download the full versions of winzip and winrar.another thing,do i need winzip if i have winrar?