Cyberduck is an FTP client with free-of-charge cloud capabilities and support for Windows and Mac OS X systems. Cyberduck uses a graphical user interface (GUI) to provide end users with access to files from servers and otherwise manage data over diverse locations, including file access, editing and storage options.
Techopedia explains Cyberduck
Users enjoy some capabilities with Cyberduck that can’t be found in other freeware file handlers. Cyberduck can accommodate files over 2 gigabytes and uses secured Secure Socket Layer/Transport Layer Security (SSL/TSL) connections and enables Secure File Transfer Protocol (SFTP) connections.
Other features in Cyberduck including bookmarking capabilities and the ability to edit metadata for files. Users can also use Cyberduck to access third-party storage locations like Amazon S3, or to distribute files in the cloud. Managing rackspace cloud files is a common use for this resource, and Cyberduck represents one of the most innovative ways to implement certain tasks related to modern cloud computing. Cyberduck also has certain capabilities for communication with Apple peripherals like the iPhone and iPad.