BoxCryptor - Boxcryptor encrypts your sensitive files before uploading them to cloud storage services like Dropbox, Google Drive, Microsoft OneDrive, Box, and many others.
Serv-U Managed File Transfer Server - Comprehensive security, automation, and control over file transfers in and outside your organization
Mega - Secure File Storage and collaboration
SSHDroid - Download SSHDroid app for Android. Connect through SSH to your device!. .
Google Drive - Access and sync your files anywhere
zFTPServer Suite - zFTPServer Suite is a user friendly and easy to use FTP server.