Archivaldo for Mac creates file archives using a proprietary compact binary file system called the Archivaldo Resource Archive or ARA. It's lightweight and easy to use, but won't substitute for your existing archiving app.
Unlimited free archiving: With Archivaldo for Mac you can create enormous archives -- the only limitation is the availability of disk space.
File list printing: The app allows you to keep track of the contents of an archive without the need to individually list file names, a useful feature when dealing with many archives on a regular basis.
Dropbox linking: You can instantly send the archive you've created to your Dropbox account with just one click.
Convenient share button: The "Share" button allows you to quickly share your archived files via email, so you won't have to launch your email application every time.
Not a mature application: There has been no update since September, 2012. Additionally, the "Pack" function is quite a chore to figure out.
The ARA archive format is not popular: So far, the ARA archive format cannot be opened by any other Mac app we know of, which considerably limits its usability.
Despite its capabilities, Archivaldo for Mac suffers from a lack of updates and ultimately proves to be limited in scope. It's not really an alternative for the archiving application on Mac; it tries to be different, but has nothing compelling to offer. If you're an expert "archivist," however, you may want to try it out.
Archivaldo is the FREE file archiver for the rest of us, where you can pack, extract, delete, password protect, search and share all your files in a compact binary file system called ARA (Archivaldo Resource Archive). The ARA file is a file system with the capacity to accommodate theoretically unlimited numbers of files, of any size or type ( jpg, gif, avi, mpg, ogg, mov, txt, mp3, mp3, acc, doc, iso, etc) only limited by the free space available in your hard disk or storage device. Also you can add or remove files from your Archivaldo archive at any time, Archivaldo will contract or expand dynamically the archive depending on your needs. The ARA file is a 100% binary file, and because of that characteristic can be stored, modified, saved, readed & transmitted by any host system without data loss or its functionality in the process.