jqui is a OS X user interface for the jq JSON query tool. It provides a query box, JSON input box, and then the output of the query.
In order to develop jqui, you'll need XCode 6.4 installed. The application runs a local version of jq so having jq installed is not necessary.
A pre-built jqui can be downloaded here. Simply unzip the application and run it. Keep in mind that Gatekeeper will need an exception for this app, or you will need to enable "Allow apps to be downloaded from Anywhere."
jqui is licensed under the MIT license.