The Unarchiver 4.2.1 updated
The Unarchiver supports more formats than I can remember. Zip, Tar, Gzip, Bzip2, 7-Zip, Rar, LhA, StuffIt, several old Amiga file and disk archives, CAB, LZX, stuff I don't even know what it is. It copies the finder file-copying/moving/deleting...