ASP.NET is an open-source, server-side web-application framework designed for web development to produce dynamic web pages.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Orchard Core is an open-source modular and multi-tenant application framework built with ASP.NET Core, and a content management system (CMS).
Ubuntu is a free and open-source operating system on Linux for the enterprise server, desktop, cloud, and IoT.