"Below is a list of freely available online mathematics, data analysis and graphing resources.
* The Interactive Library: Math - This EdInformatics.com site is a list of links to interactive integrated math and science sites. Some Java applets are standalone and some come with lesson plans and notes
* The Interactive Library: Calculators - This EdInformatics.com site is a list of links to interactive calculators including a Roman numerals calculator, a graphing applet, a virtual abacus and a scientific conversions applet
* Create a Graph - Graph data online
* GraphPad - Graph data online
The following math and data analysis resources are available for a fee.
Commercial products
* InspireData - Not an interactive site, but a nice data analysis software tool, by the developers of Inspiration and Kidspiration. You can download a free 30-day trial"
"Free tutorials using java applets to explore, interactively, important topics in precalculus such as quadratic, rational, exponential, logarithmic, trigonometric, polynomial, absolute value functions and their graphs. Equations of lines, circles, ellipses, hyperbolas and parabolas are also explored interactively. Graph shifting, scaling and reflection are also included. The definition and properties of inverse functions are thoroughly investigated. A graphical approach to 2 by 2 systems of equations is included. "