Filestash - Filestash is a modern client for FTP, SFTP, S3, WebDAV, Minio,...
FTPbox - FTPbox is an open-source application that allows you to synchronize your files to your own host...
Dropbox - Online Sync and File Sharing
ownCloud - ownCloud is an open source project enabling businesses to host their own cloud storage while maintaining regulatory and compliance needs.
Letsupload - You can upload any type of files.
Google Drive - Access and sync your files anywhere