Cyberduck

Cyberduck is a free and open-source application for Windows that lets you connect to FTP, FTP, FTP/TLS, SFTP, WebDAV, Amazon S3, Google Storage, Google Docs, Windows Azure, and Rackspace Cloud Files services.

The interface is simple and easy to use, ideal for beginners as well as experts.

It also supports file editing with an external editor, advanced bookmarking options, and advanced SSH functions.

From the Cyberduck preferences window, you can set up different parameters related to your transfers, your connection, or the available bandwidth for the application.