Overall, the only 64-bit FTP client I found fails to match the top 32-bit selections in our review Best Free FTP Client. Unless you feel that a 64-bit FTP client is essential I suggest that you look there for the solution best suited to your needs.
Vision Works Null FTP is a cut down version of the paid product. It has the typical local and remote files panes which support drag and drop, and status and log windows which provide details of the current connections and file transfers. It also has two limitations which are likely to affect your decision to use it: only three concurrent transfers and only three FTP servers are able to be defined for quick connection.