All of the simulations below were made using GeoGebra. Geogebra is free mathematics software for teaching and learning. It is an amazing program that is not hard to learn how to use. Simulations created with GeoGebra can be saved as html and run through any web browser with Java. Geogebra is available at GeoGebra.org.
Clicking on any of the links below takes you to the GeoGebraTube.org page where the simulation is located. Click the "Go To Student Worksheet" button to run the simulation. Click the green thumbs up on this page if you like a particular simulation. On this page you can click the "Embed" button to get code that can be embedded into a webpage. You can also share a simulation through Facebook, Twitter, etc. by clicking the "Share" button.
Feel free to send comments, corrections, suggestions to tjwalsh at me dot com