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.
ownCloud - ownCloud is an open source project enabling businesses to host their own cloud storage while maintaining regulatory and compliance needs.
WinSCP - WinSCP is an open source free SFTP client and FTP client for Windows.
Filestash - Filestash is a modern client for FTP, SFTP, S3, WebDAV, Minio,...
SmartFTP - . Backblaze B2, Google Drive, OneDrive, SSH, Terminal client. It allows you to transfer files between your local computer and a server on the Internet.
Syncany - Syncany is an open-source cloud storage and filesharing application.