Open Source Server Operating Systems FTP Clients

WinSCP is a popular free file manager for Windows supporting SFTP, FTP, FTPS, SCP, S3, WebDAV and local-to-local file transfers. A powerful tool to enhance your productivity with a user-friendly interface and automation options like .NET assembly or batch file scripting. Use WinSCP also for file editing, directory synchronization and site management. WinSCP is open-source and well documented. It is available in English and many other languages.

FileZilla® is a cross-platform FTP, SFTP, and FTPS client with a vast list of features, which supports Windows, Mac OS X, Linux, and more. FileZilla's dynamic tools help you move files between your local machine and your Web site's server effortlessly. For example, Filezilla lets you compare your files with in-directory server files to manage file syncing. You can also tab browse between servers and transfer files to them simultaneously, as well as edit server files on the go. And Filezilla is available in 47 languages worldwide!

Project of the Month for the Syllable operating system. The first month's project is an FTP client, currently under development.

Ftp client library (framework) for .Net written in C#, download upload, resume, create directory recursive, events

cmdftp is a command line FTP client for Unix systems that features shell-like functions, passive mode, local and remote transparent modes, broken connection resumption, multiple and recursive file transfers, auto-login, and large file support.

FTP Client for .Net Compact Framework based PocketPCs. An Adressbook and Resume Downloads functionality is integrated.