- SWI-Prolog: http://swish.swi-prolog.org/example/examples.swinb
- A Gentle Introduction to Prolog: https://bernardopires.com/2013/10/try-logic-programming-a-gentle-introduction-to-prolog/
- Prolog koans: https://github.com/araneforseti/prolog-koans
- newLISP: http://www.newlisp.org/
- Lisp FAQ Index: http://www.faqs.org/faqs/lisp-faq/
- Let Over Lambda: http://letoverlambda.com/
- CommonLISP koans: https://github.com/google/lisp-koans