Syncany - Syncany is an open-source cloud storage and filesharing application.
FTPbox - FTPbox is an open-source application that allows you to synchronize your files to your own host...
Filestash - Filestash is a modern client for FTP, SFTP, S3, WebDAV, Minio,...
Letsupload - You can upload any type of files.
FTPSync.pl - FTPSync.pl is a PERL skript to synchronize a local directory tree and a remote FTP directory tree.
Dropbox - Online Sync and File Sharing