AppYogi Software has launched Zippr, a RAR and Zip Tool on the Mac App Store (https://itunes.apple.com/app/a-zippr-rar-zip-tool/id1434280883).
It’s a file archiver and unarchiver that allows you to create and extract all kinds of archives. The app supports all the popular archive types and also some of the rare one, such as TAR, 7z, MACBIN, LZip, Z01, RAR, 7Z, LJA, BZ2, ISO, XZ, and Gzip and more.
Zippr is free, but does tout in-app purchases. It requires macOS 10.10 or higher.