IArchiver

iArchiver is a software utility for handling file archives on the Apple Macintosh. It is now renamed Rucksack.
iArchiver was designed as a universal tool for working with archives, and can be used to create, extract and convert a large number of common and legacy archive formats with a drag-and-drop interface.
iArchiver was developed and is currently being maintained by Dare to be Creative Ltd, a software company based in Vienna, Austria.