Open source releases from Microsoft
Blazor is an experimental .NET web framework using C#/Razor and HTML that runs in the browser with WebAssembly
ASP.NET Core is a cross-platform .NET framework for building modern cloud-based web applications on Windows, Mac, or Linux.
ASP.NET Core MVC is a model view controller framework for building dynamic web sites with clean separation of concerns, including the merged MVC, Web API, and Web Pages w/ Razor.
Entity Framework Core is a lightweight and extensible version of the popular Entity Framework data access technology
ASP.NET MVC 5.x, Web API 2.x, and Web Pages 3.x (not ASP.NET Core)