FileZilla - FileZilla is an FTP, or file transfer protocol, client. It lets individuals transfer single files or batches to a web server. For many years, FTP was the standard for website design. Read more about FileZilla.
Cyberduck - A libre FTP, SFTP, WebDAV, S3, Backblaze B2, Azure & OpenStack Swift browser.
FTP Rush - FTP Rush is the most powerful and free FTP/FXP/SFTP/TFTP client sofware for Windows.
WinSCP - WinSCP is an open source free SFTP client and FTP client for Windows.
sFTP Client - Transfer files with FTP, FTPS, SFTP and Cloud Services (Including SSH Terminal)
S3 Browser - S3 Browser is the name of an easy and simple to use Amazon S3 clients for the Windows operating systems.