WinRAR. They both were and are commercial products and at best have trial versions available for free. Lately however there has been a general move towards open-source freeware in the software world. To this end 7-Zip was created first in 2000.
In no way do we claim that 7-Zip is better than WinRAR. In fact we can even safely say that WinRAR has a better user interface.
But there are two very major advantages that 7-Zip has in our opinion. Firstly 7-Zip is totally and completely free. You do not even have to register at some site. The other major reason is that 7-Zip is open source. This means that other people can look at the source code and use it to develop their own versions of the application. Additionally this also means that if the original creators of the software are unable to continue developing it for any reason, other people can pick up from where they left off.
In any case you can find out more about either software by visiting their website by clicking on the following links:
1) Download Winrar Free
You can download winrar free directly from this link WinRAR
2) Download 7-Zip Free
You can download 7-zip Free directly from this link 7-Zip