I originally needed a ftp server for testing ftp functionality in an application. Filezilla Server was recommended to me as quick, easy and most importantly FREE!
Download it here > http://sourceforge.net/projects/filezilla/
They also do a free FTP client hence I'm ditching SmartFTP for Filezilla >
Yes, I know you can ftp from within I.E and the OS, but this is the real world, where usability and reliability rule :)