Django is a Python-based free and open-source web application framework.
Fly is a platform for running full stack apps and databases.
Font Awesome is a font and icon toolkit based on CSS and Less.
Google Tag Manager is a tag management system (TMS) that allows you to quickly and easily update measurement codes and related code fragments collectively known as tags on your website or mobile app.
Typekit is an online service which offers a subscription library of fonts.