FTP Synchronizer - Secure and high performance FTP File Sync product
Filestash - Filestash is a modern client for FTP, SFTP, S3, WebDAV, Minio,...
FTPSync.pl - FTPSync.pl is a PERL skript to synchronize a local directory tree and a remote FTP directory tree.
FTPbox - FTPbox is an open-source application that allows you to synchronize your files to your own host...
FreeFileSync - FreeFileSync is a free open source data backup software that helps you synchronize files and folders on Windows, Linux and macOS.
ownCloud - ownCloud is an open source project enabling businesses to host their own cloud storage while maintaining regulatory and compliance needs.