FTP Manager Lite - Free FTP Client Software - DeskShare
TJFTP - A Visual C++ FTP Client - CodeProject
LightFTPClient: a basic FTP client - CodeProject
FTP Client C# - YouTube
WinSCP :: Official Site :: Free SFTP and FTP client for Windows
GitHub - steve600/MetroFtpClient: FTP-Client based on the standard .NET classes FtpWebRequest/FtpWebResponse and some open source projects (Dragablz, MahApps.Metro, MaterialDesignInXamlToolkit, Newtonsoft.Json, OxyPlot, Prism, WpfLocalizeExtension)