Physics, particles, agents and cellular automata set in motion by computation.
A personal site collecting algorithm experiments and visual toys. Fractals, reaction–diffusion, chaos, the n-body problem, boids, the travelling salesman problem, Voronoi diagrams and more can be set in motion and explored in the browser.
A huge archive of mathematical and physical simulation images by a researcher at École polytechnique in France, with more than ten thousand pictures and animations grouped by theme — real numbers, fractals, quantum physics, astronomy and more. The site is old-fashioned and easy to get lost in, but it is still being updated.
Under the banner "Coding Adventures", this channel implements fluid simulation, ray tracing, terrain and planet generation and more from scratch. You see how physics and algorithms turn into images step by step, which makes the techniques easy to adopt.
A creative-coding channel built around p5.js and similar tools. Its "Coding Challenges" build small pieces on fractals, prime spirals, physics simulations and other mathematical and natural phenomena from scratch, on camera. By the same author as The Nature of Code.
A book by Daniel Shiffman on simulating natural systems with code. It covers physics, particles, autonomous agents, cellular automata, fractals and genetic algorithms with p5.js, and is freely readable online.