You can find the example mods in your Foundation installation directory, under the
This example mod shows the basic structure of a Foundation mod and can be used as boilerplate code for getting started
This advanced example mod introduces the new modding feature from Foundation 1.2.0.
This example mod shows the basics of creating a custom map. The example contains a complete example of all the features available for creating maps in mods. More info on custom maps can be found in the corresponding API documentation page.