cdnjs is a free distributed JS library delivery service.
JSDelivr is a free public CDN for open-source projects. It can serve web files directly from the npm registry and GitHub repositories without any configuration.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
TiddlyWiki is an open-source notebook for capturing, organising and sharing complex information.
Ubuntu is a free and open-source operating system on Linux for the enterprise server, desktop, cloud, and IoT.