Spirograph Applet - Makes a spirograph, just like the kid toy. Euclid's Elements, An Introduction - Includes the entire 13 books on plane geometry, geometric and abstract algebra, number theory, incommensurables, and solid geometry. Uses java applets to illustrate the principles. Java Demos for Probability and Statistics - College professor's applets. Chaos and Fractals Applets - Several java applets for use in exploring the topics of chaos and fractals. xFunctions - The xFunctions applet covers several aspects of calculus and pre-calculus mathematics, including graphs, parametric curves, derivatives, Riemann sums, and integral curves. Famous Curves - About 60 famous mathematical graphs or curves drawn by applets. The Mandelbrot Set - Examine and tweak Mandelbrot Set fractal images. [Displaying the Mandelbrot set requires a great deal of computation. The user is best off with a fast machine, drawing small pictures.] Interactive Math Activities - More than 320 Java applets help illustrate topics in arithmetic, algebra, geometry, mathmagic, optical illusions, probability, calculus, combinatorics MathinSite - Math Insight from a Math Web Site - Mathematical Java applets with accompanying theory and tutorial sheets aimed mainly at undergraduate engineering students. Some applets also useful for K-12. Graphical Ruler and Compass Editor (GRACE) - An interactive ruler and compass construction editor for use in teaching the fundamental concepts of geometry to high school students. Java. Interactive Mathematics Exploration - Interactive Java applets. SpiroGraph - Information, equations, and customizable Applet, also available for download. WisWeb - The Freudenthal Institute for secondary education presents a collection of applets concerning algebra.