StorPool - StorPool is designed from the ground up to provide cloud builders, shared hosting providers and MSPs with the most resource efficient storage software on the market.
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.
Dell EMC UnityVSA - dell-emc-unityvsa-overview-deployment
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.
PetaSAN - PetaSAN is an open source Scale-Out SAN solution offering massive scalability and performance.
CloudFuze - Managed Cloud Office Migrations with Unparalleled Security & Performance.