This website from Lucidchart provides a range of examples of Concept Maps and allows the user to create their own or use one of the templates provided.
"Concept maps were developed by Joseph Novak at Cornell University to represent students’ science knowledge. They are similar to mind maps, but unlike mind maps, need not branch out from one central idea. Concept maps are highly customizable: you can use whichever shapes and color schemes you feel best match your project." (Lucid Software Inc., 2014)
Concept Map Examples. (2014). Lucid Chart. Retrieved from https://www.lucidchart.com/pages/concept-map-examples-and-templates