Looks like RavenDB took a lot of inspiration from CouchDB and CouchApp:
The only reason RavenDB has attachments support is that we wanted to support the notion of Raven Apps (see Couch Apps) which are completely hosted in RavenDB. That was the original impetus. Since then, they evolved quite nicely. Attachments in RavenDB can have metadata, are replicated between nodes, can be cascade deleted on document deletions and are HTTP cacheable.
I didn’t even know RavenDB has something like
Original title and link: RavenDB, Attachments, and Raven Apps (NoSQL databases © myNoSQL)