At this point this is just a collection of online resources. These will get sorted and rated at some point, but I cant say when!
Ackermans Function Sand Box Ackermans
Sequences to Functions, Try your date of Birth Sandbox sequences to functions
Light-Bot, the Game Lghtbot the game
Genetic algorithms solving light bot Genetic Algorithms, explained with Lightbot
A downloadable Forest etc. Fire simulator http://www.firelab.org/project/farsite
Schellings model from VI Hart Triangles and squares
The NetLogo Models page: gives an impresion of whats available http://ccl.northwestern.edu/netlogo/models/
HTML5 example of a Cloth model http://andrew-hoyer.com/experiments/cloth/
ParCycle http://www.mrspeaker.net/dev/parcycle/
Boxes Falling https://29a.ch/sandbox/2010/box2d2/test.html
Breathing NewYork http://www.darkhorseanalytics.com/blog/breathing-city
Excelets web page http://academic.pgcc.edu/~ssinex/excelets/
Word count Rank and frequency http://www.wordcount.org/main.php
Zipfs Law https://en.wikipedia.org/wiki/Zipf%27s_law
Transport etc. Demographic Gravitation https://www.instagrok.com/results.html?query=Demographic%20gravitation
And an appropriate atlas to go with it http://worldpopulationatlas.org/
Pathfinder a visual Choreography http://princemio.net/portfolio/pathfinder/
City Symphonies Looking at traffic http://markmckeague.com/work/city-symphonies/
Digitising dance We are ChopChop
Flocking, in HTML5/Processing http://p5js.org/examples/examples/Simulate_Flocking.php
Lindermayer systems HTML5, play with the code http://p5js.org/examples/examples/Simulate_L-Systems.php
Creatures avoiding planks http://otoro.net/planks/
Self balancing pendulum http://otoro.net/ml/pendulum-esp-mobile/index.html
Shakespear's plays as networks http://www.martingrandjean.ch/network-visualization-shakespeare/