cdnjs is a free distributed JS library delivery service.
Cowboy is a small, fast, modular HTTP server written in Erlang.
A multi-dimensional charting library built to work natively with crossfilter and rendered using d3.js
Heroku is a cloud platform as a service (PaaS) supporting several programming languages.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Ruby on Rails is a server-side web application framework written in Ruby under the MIT License.