XShare - XShare – File Fast Transfer developed and published by Shalltry Groups.
Syncany - Syncany is an open-source cloud storage and filesharing application.
Zapya - Zaypa is a cross-platform transferring and sharing!
Filestash - Filestash is a modern client for FTP, SFTP, S3, WebDAV, Minio,...
SuperBeam - SuperBeam is a file sharing app that makes moving files across devices much easier by using technologies like NFC and QR codes instead of plug ins. It is one of the fastest was to move files from one device to another.
FTPSync.pl - FTPSync.pl is a PERL skript to synchronize a local directory tree and a remote FTP directory tree.