Cyberduck is an open source FTP, SFTP (secure file transfer protocol), WebDAV (allows users to create, change and modify files on a remote server), Cloud Files and Amazon S3 browser for the MAC. An easy to use interface provides quick access to bookmarks. File transfer is as easy as drag and drop and the outline view of the browser allows large folder browsing and previewing of files with Quick Look. Editing files is seamless with local external editor applications.
Download Cyberduck from their website. http://cyberduck.ch/
OS: Mac only