Apache is a free and open-source cross-platform web server software.
Phusion Passenger is a free web server and application server with support for Ruby, Python and Node.js.
Pinterest is an image sharing and social media service designed to enable saving and discovery of information.
RackCache is a quick drop-in component to enable HTTP caching for Rack-based applications.
Ruby on Rails is a server-side web application framework written in Ruby under the MIT License.
Ubuntu is a free and open-source operating system on Linux for the enterprise server, desktop, cloud, and IoT.