StorAmp - StorAMP is a FREE cloud storage explorer that supports variety of cloud providers:
Kofax CloudDocs - Kofax CloudDocs is a sophisticated cloud-based storage and protection solution that provides businesses with a simple yet powerful way to safeguard their important files.
Cloud Storage Manager - Cloud Storage Manager provides you with an Explorer view of all your Azure Blobs. You can see details of each individual Blob, including Blob size, date the Blob was created and modified, as well as what Storage Tiering the Blob currently is in.
Proton Drive - Proton Drive is a comprehensive protection and storage solution that is easy to use and provides complete synchronization and remote support.
CloudXplorer - This cloud storage management system enables the clouds users to manage and explores their favorite cloud storage accounts in a more systemized way.
AfterLogic Aurora - Afterlogic Aurora is an enterprise collaboration system for small and medium-sized business.