Finally the Mac OS X users can get an open source program that allow file compression in other formats than zip (native on Mac OS X). Keka can archive files in 7z, Zip, Tar, Gzip, Bzip2. And can unarchive the following formats: RAR, 7z, Lzma, Zip, Tar, Gzip, Bzip2, ISO, EXE, CAB, PAX, ACE (PPC). [...]