2. OrchardOrchard is a free, open source, community-focused Content Management System built on the ASP.NET MVC platform.
3. OrcharddocDocumentation for Orchard 1.x (not Orchard Core, for that see https://docs.orchardcore.net/).
6. OrchardcoreOrchard Core is an open-source modular and multi-tenant application framework built with ASP.NET Core, and a content management system (CMS) built on top of that framework.