Syncany - Syncany is an open-source cloud storage and filesharing application.
Dropbox - Online Sync and File Sharing
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...
CM Transfer - CM Transfer – Share Any Files with Friends Nearby is a free to use mobile application that comes with the beautifully redesigned new look and enhanced file transferring technology that makes the sharing of files faster, simple, and secure.
XShare - XShare – File Fast Transfer developed and published by Shalltry Groups.