The FileCloud server is self-hosted and gives me the ability to store and share files, sync across different devices and back-up all documents and photos so that I don't have to worry about security.
Koofr - Koofr offers safe EU based cloud storage with free storage space for life and options to connect multiple cloud accounts (Dropbox, Google Drive, OneDrive) and your personal storages.
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
MultCloud - Multiple Cloud Storage Manager: Migrate, move, sync, copy, backup and transfer cloud files with MultCloud, which supports Dropbox, Box, Google Drive, Mega, OneDrive and FTP, etc.
WebDrive - WebDrive File Access Client allows you to open and edit server-based files without the additional step of downloading the file.
CloudFuze - Managed Cloud Office Migrations with Unparalleled Security & Performance.
ExpanDrive - ExpanDrive is a fast network drive and browser for cloud storage.