WinSCP - WinSCP is an open source free SFTP client and FTP client for Windows.
Knox - Knox offers easy disk image encryption and comes with a built-in backup service.
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.
Kruptos - Lock and encrypt your photos, movies, files and folders using 256-bit file encryption.
Cyberduck - A libre FTP, SFTP, WebDAV, S3, Backblaze B2, Azure & OpenStack Swift browser.
Advanced File Security Basic - Download Advanced File Security Basic. Protect files by encrypting them with a strong password, a series of questions, or even an USB key you can carry around with this powerful security solution