odrive - odrive aggregates all cloud storage. Access, sync, share, and encrypt everything in one place. Integrations to 20+ storage services, desktop sync, Linux support, placeholder files, zero-knowledge-encryption, web client, advanced sharing, and more!
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.
Mover.io - Mover is a tool to migrate data between cloud storage providers quickly, securely and with little hassle. It supports all major providers and has a range of automation features to support even the largest transfers.
CloudHQ - Integrate Box, Gmail, Salesforce, Google Drive, Dropbox, Basecamp, Evernote, and more.
Cloud Combine - Cloud Combine is a browser and manager for the cloud services.
FreeFileSync - FreeFileSync is a free open source data backup software that helps you synchronize files and folders on Windows, Linux and macOS.