This is a cool app.

plain cloud lets you manage the files you have stored in icloud from your mac.

it shows a list of all the apps that have saved files in your icloud um, cloud?
you then click on the app and it launches a finder window with those files in it!

With Plain Cloud, you are able to access your iCloud with the Finder. Just click the specific App and you will see all documents in a new Finder window