IIS Administrators, see BasicIISSite for a barebones example.
Classic ASP users, see SampleAspSite and ScriptAccess for both URL and COM API examples.

ASP.NET users, see BasicWebApplication for a barebones example.

If you want to serve/resize images stored in a SQL database, see SqlReaderSample.
If you want to serve/resize images located on Amazon S3, see S3ReaderSample.

If you want an example of combining client-side live cropping with server-side generation, see JCropExample.

If you want a WPF example, see ImageResizerGUI.

If you want a crazy example that uses a lot of plugins and features, see ComplexWebApplication.

ConsoleApplication and MvcSample are currently works in progress, ignore them.