FTP Client that intergrates fully into the Windows Explorer
What is wrong with using the FTP client included with windows explorer?
Open Windows Explorer and type your ftp address in the address bar (e.g. ftp://ftp.foo.com).
You will be prompted for credentials if the site doesn't allow anonymous access.
If you want to include the username when accessing the FTP site use: username@ftp://ftp.foo.com
Windows Explorer FTP view http://brettski.com/f111/we_ftp.jpg
There are several good ways to map a drive letter in Windows to an FTP location.
Unkwntech asked "How can I mount an FTP to a drive letter in windows?"
It appears he has chosen WebDrive as his accepted answer.