From NCH Software:
Classic FTP Free for Mac is the most stable and comprehensive FTP client available. The graphic user interface is easy to learn and use. Classic FTP Free helps maintain your website by uploading and downloading files quickly and efficiently. Classic FTP secures file transfer by using FTP SSL security. Classic FTP Free for Mac is compatible with all popular FTP servers. Use the synchronization tool to check local and remote folders for the most updated files. Easily drag and drop files within the user interface.