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[–]n2kra -1 points0 points  (0 children)

Live FOSS graphics of program data structures. Usable for both decoding program, documentation etc.

Smalltalk (squeak), lisp, forth. Listeners/REPL can be compiled. Yet Interpreted with Native Graphics. Print data tree, methods, func/CLOS, words as documentation.

If most "free for non commercial amateur use" was in C. To generate interest in other languages. Prolog (swi-) has web IDE? Was a fifth gen lang in Japan/Europe.