vsftpd - Very secure FTP Daemon, a secure, fast FTP server for UNIX systems, including Linux.
Cloudfogger - Easy and secure encryption for the cloud. Provides security for all cloud storage services like Dropbox, OneDrive and Google Drive.
FileZilla Server - Download FileZilla Server 0.9.60.2 for Windows
Google Drive - Access and sync your files anywhere
ProFTPD - The Official ProFTPD web site. ProFTPD is a high-performance, extremely configurable, and most of all a secure FTP server, featuring Apache-like configuration and blazing performance.
BoxCryptor - Boxcryptor encrypts your sensitive files before uploading them to cloud storage services like Dropbox, Google Drive, Microsoft OneDrive, Box, and many others.