Good free FTP/SFTP server for Windows - Core FTP / SFTP Server

If you would like to install a free but good FTP/SFTP server for Windows, CoreFTP secure FTP server is a good one. This is useful for transferring files between computers or to act as a standalone FTP/SFTP server.
CoreFTP secure FTP server : http://coreftp.com/server/

Tip: For faster downloads, use the CoreFTP Lite client which is also free.

I also tested freeSSHd which is open source. However, the transfer speed was very low - only about 35 kbps on an intranet. On CoreFTP however, I got around 600kbps between two computers on an intranet.