"One of the best and most popular FTP clients."
FileZilla is one of the most popular FTP clients that exist. FileZilla is totally free, and offers all the functions and possibilities you`d expect from this type of program, some of which are:
FileZilla includes an FTP site administrator, where you can store FTP server addresses, so you don`t have to load them each time.
It has an intuitive interface, that looks similar to Windows Explorer, and shows local and remote windows, where you can move files from one to the other simply by dragging with the mouse. Easy.