Apache is a free and open-source cross-platform web server software.
cdnjs is a free distributed JS library delivery service.
MaxMind is a provider of geolocation and online fraud detection tools.
OpenStreetMap is a free, editable map of the whole world that is being built by volunteers largely from scratch and released with an open-content license.
Pure CSS is a set of small, responsive CSS modules that can be used in web projects.
Ubuntu is a free and open-source operating system on Linux for the enterprise server, desktop, cloud, and IoT.