Maestral is described as 'open-source Dropbox client written in Python. The project's main goal is to provide a client for platforms and file systems that are no longer directly supported by Dropbox'. There are three alternatives to Maestral for a variety of platforms, including Android, Kindle Fire, Linux, Mac and Online / Web-based. The best alternative is Dropbox, which is free. Other great apps like Maestral are FolderSync (Freemium) and Dropsync (Dropbox Autosync) (Freemium).