Does anyone know of a pedagogically-minded quantum computer simulator?

The only one I'm aware of is in Common Lisp: https://www.dropbox.com/s/n5k9pikkcx5besa/QUANTUM_INTERPRETE....

It doesn't take much (LOC) to implement a simulator. You can understand how one works by reading the source: https://github.com/adamisntdead/QuSimPy