Bootstrap is a free and open-source CSS framework directed at responsive, mobile-first front-end web development. It contains CSS and JavaScript-based design templates for typography, forms, buttons, navigation, and other interface components.
Cowboy is a small, fast, modular HTTP server written in Erlang.
Google Maps is a web mapping service. It offers satellite imagery, aerial photography, street maps, 360° interactive panoramic views of streets, real-time traffic conditions, and route planning for traveling by foot, car, bicycle and air, or public transportation.
Heroku is a cloud platform as a service (PaaS) supporting several programming languages.
Ruby on Rails is a server-side web application framework written in Ruby under the MIT License.