Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
FileZilla Server - Download FileZilla Server 0.9.60.2 for Windows
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
ProFTPD - The Official ProFTPD web site. ProFTPD is a high-performance, extremely configurable, and most of all a secure FTP server, featuring Apache-like configuration and blazing performance.
Better Uptime - We call you when your website goes down
vsftpd - Very secure FTP Daemon, a secure, fast FTP server for UNIX systems, including Linux.