I have written a query language for JSON named ObjectPath. It is somewhat similar to JSONPath but it is an active project and at this point - much more advanced. My company has used it in several of its enterprise software projects and it proved very stable and relatively fast. I would like to share it with the JSON community.
The main link is http://adriank.github.io/ObjectPath
(see reference and Github pages for more details).
The code license is now AGPL 3, but we are thinking about making it BSD.
Founder/CTO - Asyncode Ltd.