I love the great work Brian Harvey and Jens Mönig have done with Snap! It's like a non-watered-down version of Scratch, with the full power of Scheme (first class functions, lexical closures, special forms, continuations, build your own blocks, user definable control structures, extensible in JavaScript).
Snap! 5 is here!
https://news.ycombinator.com/item?id=20309162
Here's the elegant Snap! visual Y Combinator:
Visual Lambda: Note how the gray block after the "report", shrink-wrapped around the "call (fn) with inputs (fn) []", is a visual "lambda". It looks like a "gasket" or "baggie" that insulates the code inside from being immediately evaluated, returning a closure instead.
Here's an excellent mind-blowing example by Ken Kahn of what's possible: teaching kids AI programming by integrating Snap! with existing JavaScript libraries and cloud services like AI, machine learning, speech synthesis and recognition, Arduino programming, etc:
AI extensions of Snap! for the eCraft2Learn project
https://ecraft2learn.github.io/ai/
>The eCraft2Learn project is developing a set of extensions to the Snap! programming language to enable children (and non-expert programmers) to build AI programs. You can use all the AI blocks after importing this file into Snap! or Snap4Arduino. Or you can see examples of using these blocks inside this Snap! project.
https://github.com/ecraft2learn/ai
http://lntrg.education.ox.ac.uk/presentation-of-ai-cloud-ser...
What's the difference between Snap! and Scratch?
https://news.ycombinator.com/item?id=20311457
LLOGO MACLISP sources with robotic turtle drivers:
https://news.ycombinator.com/item?id=12207532
>Here is the source code to LLogo in MACLISP, which I stashed from the MIT-AI ITS system. It's a fascinating historical document, 12,480 lines of beautiful practical lisp code, defining where the rubber meets the road, with drivers for hardware like pots, plotters, robotic turtles, TV turtles, graphical displays, XGP laser printers, music devices, and lots of other interesting code and comments.
