Cyberduck is an incredibly efficient and clean file transfer protocol, or FTP, client. It supports most modern FTP variants including Amazon S3 and Dropbox. The interface for Cyberduck is intended to be as clear and simple as possible. The bulk of the window is dedicated to showing files and directories. The client is capable is sending and receiving files from servers. It has error checking and correction. Cyberduck can be tied to external editors to make modifying or viewing files on an FTP server simple. Extensive language support is also available. A drawback of Cyberduck is that the program sometimes has difficulty transferring data from certain servers.
Free and secure network file transfer