From SolarWinds:
Serv-U FTP Server from SolarWinds delivers quick, easy, and reliable file transfer for your organization. You can exchange sensitive files with your trading partners using secure FTPS (FTP over SSL/TLS) over both IPv4 and IPv6 networks. Users can view, upload, and download files from intuitive web and mobile interfaces. Designed for small businesses, Serv-U FTP Server is an affordable and secure file transfer software that helps you accomplish all your internal and external file transfer needs.
Key Features:
Fast and secure file transfer with FTP and FTPS (over SSL/TLS).
View, upload, and download files from the web and mobile devices.
Supports optional Gateway to avoid data at rest in DMZ networks.