FileZilla Server - Download FileZilla Server 0.9.60.2 for Windows
Beyond Compare - Beyond Compare allows you to compare files and folders.
vsftpd - Very secure FTP Daemon, a secure, fast FTP server for UNIX systems, including Linux.
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
Baby FTP Server - The simplest FTP server to setup. No authentication required.
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.