Tarsnap - Tarsnap is a secure online backup system for UNIX
Box - Box offers secure content management and collaboration for individuals, teams and businesses, enabling secure file sharing and access to your files online.
Baccus - Baccus simplifies and manages multiple backups to external drives and NAS systems.
Filecamp - Digital Asset Management & Online Proofing tools beautifully integrated, into one secure and cost-effective solution. Manage all your digital marketing assets from your own good-looking, easy-to-use spot in the cloud. Unlimited users in all plans!
Solid Backup - Export all your Airtable bases in 3 clicks
Nubo - A self-hosted file sharing application in Haskell.