Keka is a file archiver for OS X. It is available for free, but donations are requested to further the project. Similar to making a donation, you can also purchase Keka on the Mac App Store for $2.99 USD.
Supported compression formats: 7z, Zip, Tar, Gzip, Bzip2
Supported extraction formats: RAR, 7z, Lzma, Zip, Tar, Gzip, Bzip2, ISO, EXE, CAB, PAX, ACE