GMX File Storage - The GMX File Storage Manager allows your PC and your GMX File Storage to exchange data via the...
Dropbox - Online Sync and File Sharing
Cloudu - Secure German online storage and file sync service. Apps for all major platforms.
WeTransfer - WeTransfer is a free service to send big or small files from A to B.
CloudBerry Box - CloudBerry Box provides bi-directional synchronization of data across remote computers.
Microsoft OneDrive - Secure access, sharing & file storage