SlimFTPd is a standards-compliant FTP server from WhitSoft Development under a BSD license. It has no interface and is configured through a single configuration file. A utility to register it as a Windows Service is included. However, prudent use of this tool should be limited to private internal networks as the tool has not had enough exposure to the community for bug reports. All previous versions should be updated to at least 3.181 as "remote code execution" and "denial of service" holes were found on previous releases.
WhitSoft Development [1]