FTP Now is a fast, multi-threaded Windows FTP client software with the look-and-feel of Windows Explorer. It makes moving files between the Internet and your computer as simple as local file manipulation. Features include full drag and drop FTP upload and download, transfer entire folders at once, connection wizard, upload/download multiple files simultaneously, fully customizable user interface, CERN proxy support, bookmark remote folders, resume support for download and upload, automatically send keepalive command, windows XP theme support, windows explorer look and feel, and unlimited free technical support.

Fully functional 30 day trial and it's only $29.95.