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. - http://www.cs.rice.edu/~jwarren/grace/
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. - http://mathinsite.bmth.ac.uk
Interactive Math Activities - More than 320 Java applets help illustrate topics in arithmetic, algebra, geometry, mathmagic, optical illusions, probability, calculus, combinatorics - http://www.cut-the-knot.com/Curriculum/
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.] - http://www.math.utah.edu/~alfeld/math/mandelbrot/mandelbrot.html
Famous Curves - About 60 famous mathematical graphs or curves drawn by applets. - http://www-groups.dcs.st-and.ac.uk/~history/Java/index.html
Online Tutor - on-line math tutor and science tutor for school age children - Place values to Probability, geometry, ratios, percentages, fractions and measurements, solar system, weather and human body - http://www.infomath.com/html/online-tutor.asp
xFunctions - The xFunctions applet covers several aspects of calculus and pre-calculus mathematics, including graphs, parametric curves, derivatives, Riemann sums, and integral curves. - http://math.hws.edu/xFunctions/
Java Applets for Visualization of Statistical Concepts - These applets are designed for the purpose of computer-aided education in statistic courses. The intent of these applets is to help students learn some abstract statistics concepts easier than before. The approach taken here is based upon visualization an - http://www.kuleuven.ac.be/ucs/java/index.htm
Graph Explorer - A Java applet for graphing functions, with smooth zooming and panning across graphs, and variable parameters which can be used for animation. - http://www.langara.bc.ca/mathstats/resource/GraphExplorer/
TenBlocks and IntegerZone - TenBlocks turns the times tables into a series of puzzles. IntegerZone lets users explore aspects of arithmetic and number theory using the integers themselves as the interface. - http://www.1729.com/applets/
Spirograph Applet - Makes a spirograph, just like the kid toy. - http://www.wordsmith.org/~anu/java/spirograph.html
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. - http://aleph0.clarku.edu/~djoyce/java/elements/elements.html
Chaos and Fractals Applets - Several java applets for use in exploring the topics of chaos and fractals. - http://math.bu.edu/DYSYS/applets/index.html
Manipula Math with Java - Over 200 applets for middle school students, high school students, college students, and all who are interested in mathematics. Interactive programs and a lot of animation that helps with understanding mathematical ideas. - http://www.ies.co.jp/math/java/index.html