Tool for testing Schema.org markup [closed]

Does anyone know of a good tool to test Schema.org (http://schema.org/) markup?

The Google Rich Snippet tool does not support it properly. Even with the correct markup given, it says "Insufficient data to generate the preview."

update: Now the Google Rich Snippet tool supports some schema.org markups.

This one came to my attention recently. linter.structured-data.org

I like that it generates a preview when the Google Rich Snippet tool reports "Insufficient data to generate the preview." The structured-data tool also generates a more structured, almost graphical result, which makes the results a bit easier to understand.

The microdata-tool jQuery plugin.

Included in your markup it displays the metadata it is able to extract. Thus it's ideal for using it offline or on localhost. Although it's work in progress, it supports many (if not all, I'm not sure) of the schema.org metadata.