Just double-click the icon and the content of the file will appear on the screen. Regardless of the compressed file's format, you can unpack more than 40 different formats, including CAB, ARJ, LZH, TAR, GZ, ACE, UUE, BZ2, JAR, ISO, RAR, Zip or 7Z.
You can also add a password or a comment. The program integrates itself perfectly in the right-button menu, so you can easily create RAR and ZIP files. Winrar is a free app that lets you compress and unpack any file in a very easy, quick and efficient way.