Internet Neighborhood, the first Explorer-based FTP client on the market, connects PCs to FTP servers by utilizing the Windows Explorer program. Internet Neighborhood is a Windows shell extension that lets you browse remote FTP sites as if they were folders on your own hard drive. You no longer need a separate FTP client in order to work with files on remote sites. Simply launch Windows Explorer, browse online, then drag and drop files directly into your file system.
More info:
hxxp://www.knoware.com/products/inpro/index.html