Datahike - A durable datalog database adaptable for distribution.
Samsung Cloud - Samsung Cloud is a cloud file management application made by Samsung that lets you manage your files and folders across devices.
Datomic - The fully transactional, cloud-ready, distributed database
Filen - Next Generation end-to-end encrypted cloud storage. Get started with 10 GB of free space.
Matisse - Matisse is a post-relational SQL database.
Files App - Files is a beautiful single-file PHP file browser and manager that can be dropped into any dir on your server, instantly creating a gallery of files and folders.