miFiles is a simple, free FTP client for Windows that stands out among other, similar tools for its simplicity and ease of use.
It looks similar to other FTP clients except for its local file explorer, which is divided into a directory tree and a list of files where it displays the files included in the selected directory.
To add FTP sites, you have an assistant that makes the task of inserting FTP servers much easier. It also includes compression and synchronization functions, among others.
All of this makes miFiles a good option that's well worth a try.