[encoderer]

I dream of a future where there is a standard rest interface for cloud file storage, that somebody will put an API in front of any non-compliant services, and that applications can talk to any datastore with minimal hacking.

This has been done before with, eg ODBC.

[diafygi]

Here's some projects you should check out:

* RemoteStorage.js[1] (they plan on adding support for Dropbox, Drive, etc.)

* CloudRail[2] (nonfree source)

* CloudDock[3] (proxy service)

* byoFS.js[4] (encrypted cloud storage, I maintain this)

[1]: https://github.com/remotestorage/remotestorage.js

[2]: http://cloudrail.com/

[3]: http://clouddock.co/

[4]: https://github.com/diafygi/byoFS

[JohnDoe365]

Camlistore https://camlistore.org/community

[Rondom]

You might want to try Unhosted and related projects.

https://unhosted.org/

[crucio]

Not what you're asking for, but a friend is working on something similar: https://www.seedrs.com/startups/combicloud

[niutech]

There are already open standards for cloud storage:

- Apache Libcloud/Deltacloud/jclouds

- CDMI

- NDMP

- NFS

- remoteStorage

- SME

- WebDAV