MimarSinan CompreXX 

CompreXX mark4 is a collection of applications and plug-ins which help you work with archive files. You can create new archives, update existing archives, and extract files contained inside archives. CompreXX mark4 makes working with archives as fast, efficient and powerful as you want.

If you download anything at all from the Internet, chances are it will be an archive file. Because download times from the Internet must be as short as possible, Internet content which you can download to your computer is compressed - so it takes up less space, and the download happens faster. Once you download these compressed files, called archives, you need to extract the files they contain, so you can access the actual content you downloaded.