FTPbox - FTPbox is an open-source application that allows you to synchronize your files to your own host...
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.
Syncany - Syncany is an open-source cloud storage and filesharing application.
Koofr - Koofr offers safe EU based cloud storage with free storage space for life and options to connect multiple cloud accounts (Dropbox, Google Drive, OneDrive) and your personal storages.
Filestash - Filestash is a modern client for FTP, SFTP, S3, WebDAV, Minio,...