cdnjs is a free distributed JS library delivery service.
ExoClick is a Barcelona-based online advertising company, which provides online advertising services to both advertisers and publishers.
Google Analytics is a free web analytics service that tracks and reports website traffic.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Phusion Passenger is a free web server and application server with support for Ruby, Python and Node.js.
Pure CSS is a set of small, responsive CSS modules that can be used in web projects.
Ruby on Rails is a server-side web application framework written in Ruby under the MIT License.