In contrast with , this page lists demos that were shared by anyone with the community (and still have working links). You may not always be able to find the creators active in the community these days (or indeed ever).
Again, currently skews heavily non-commercial.
Code Scrubber: A UI for scrubbing over numbers in Javascript by Dominik Jančík
Polygon: A spatial approach to sequencing musical rhythms by Clam R
Magic Hands: Swirling colors on screen by moving your hands by Tak Tran (prose)
AI Tarot reading app by Tom Larkworthy
Hamish Todd often posts neat videos
Live coder: a plugin for VSCode that shows how your code runs as you type by Fraser Greenlee
Data Rabbit: a flow-based Clojure notebook+whiteboard sandbox by Ryan Robitaille
WhiteBox: a tool for visualizing C++ code execution by Andrew Reece
The Creativity Lab at UCSD has had multiple demos shared.
Tomorrow Corporation Tech Demo (thread)
Brief: A live-updating concatenative environment (thread; website)
Field: A live-programming environment for making digital art