rar7Zip is a useful archive utility for Mac OS X. With it you can create and extract all popular archive formats, such as RAR, Zip, 7Z, ISO, EXE, CAB, BZip2, GZip, TAR etc.
rar7Zip offers many ways to create or extract file archives. Double click on archive file to decompress and drag and drop to the rar7Zip icon on Dock. There's no need to open rar7Zip first.