Here are excerpts from the description:
regulations-parser is written in Python.
regulations-core is a Django and Haystack application.
The regulations-site front-end is a Backbone.js application nested within AMD modules using Require.js. We also use a Grunt-based build system with Jasmine for unit testing. On the back-end regulations-site is a Django application. [...]
We invite contributions to any part of the application. The project is in the public domain, and all contributions to it will be released as such. By submitting a pull request, you are agreeing to waive all rights to your contribution under the terms of the CC0 Public Domain Dedication. [...]
HT Eric Mill