Fed up with limited compression performance of Stacker, PKZIP, UC2, ZOO, ARJ and LHA? CRUSH will usually give 5%-50% improved compression over any other DOS compression tool, and yet allows the user to continue using the archiver already in use. CRUSH is fast and the ideal choice for users keen to save disk space. I can’t help but note that the last update of CRUSH was in 1995!

http://ourworld.compuserve.com/homepages/pocketware/crush.htm