Amigadepacker uncompresses various compression
formats used on AmigaOS. The supported formats are
PowerPacker, XPK SQSH, MMCMP, and StoneCracker 4.04. It can also decrypt PowerPacker encrypted data files.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.