FTPshell Server is a windows FTP service that enables remote file downloads and uploads. It supports regular and secure FTP based on both SSL/TLS and SSH2. It is also extremely easy to configure and use. Key features include

FTPShell is an FTP server that transforms any Windows computer into an FTP site and enables distribution of files to other users. You can create password-protected or anonymous accounts, specify folders and files that are accessible for each account, and monitor activities of connected users.

SSH based secure FTP (SFTP)
In addition to regular FTP, FTPshell Server also supports SSH2 based secure FTP (SFTP).

SSL/TLS based secure FTP (FTPS)
In addition to regular FTP, FTPshell Server also supports Implicit and explicit SSL/TLS based secure FTP (FTPS).

FREE personal edition
The FREE personal edition is available for non-commercial use and supports unlimited account creation and up to 2 simultaneous connections.

Run as windows service
FTPshell Server runs as a windows service and can be configured to start automatically on boot up or started manually.

Anonymous and password protected accounts
FTPshell Server enables you to setup both anonymous and user accounts on the same computer.

The license of this software is Free Trial Software, the price is $99.95, you can free download and get a free trial.