WinSCP is not the most user friendly FTP client out there but it must be one of the most secure. If security is your concern, you won't be disappointed by what it offers.
This small tool's full-featured installer includes additional, optional software called Jing, but you have to select it; the default installation omits Jing.
The installer also presents a choice between two different main interface styles, a full-featured Commander interface with panels for local and remote directories and a scaled-down Explorer interface that only accesses remote directories. The Commander interface is a small dialog with a navigation pane and places to enter host and user names, a password, and a private key file.
An About button links to an extensive Web-based Help site. You can select between SFTP, SCP, and FTP transfers and several languages, but not much more, though, in this case, less is more since the program's goal is simplicity. One feature we did like a lot is the ability to Export the program's complicated preference settings with a click. WinSCP transferred files quickly and securely in testing.
Features: Graphical user interface, Support for SFTP and SCP protocols over SSH-1 and SSH-2 and FTP protocol, Batch file scripting and command-line interface, Directory synchronization in several semi or fully automatic ways, Integrated text editor, etc...