ACT-R: A cognitive architecture
en.wikipedia.org
en.wikipedia.org
This paper here is a notable exception inasmuch they do document their algorithm.
http://act-r.psy.cmu.edu/publication/
This is a good one: "How Can The Human Mind Occur In The Physical Universe" http://act-r.psy.cmu.edu/wordpress/?post_type=publications&p...
and
"A Spreading Activation Theory of Memory" http://act-r.psy.cmu.edu/wordpress/?post_type=publications&p...