* [https://github.com/mozilla/django-browserid django-browserid], a library for hooking up [https://login.persona.org/ Persona] authentication to a Django site.
* [https://github.com/clouserw/tower tower], an L10n library to add some functionality to Jinja
* [https://github.com/mozilla/elasticutils], an iterative API for building Elasticsearch searches
* [https://github.com/mozilla And many more!]