American Association of Physics Teachers
Com Padre Digital Library: Open Source Physics: Special Functions Model
This downloadable java simulation shows a variety of special functions. Functions included are Legendre polynomials, Chebyshev polynomials, and Bessel functions.
Hofstra University
Hofstra University: Function Grapher
This site contains an actual online function graphing utility. Allows you to type in a function, choose max and min x and y values, zoom in and out, as well as a variety of other features. Just like having a graphing calculator online.
Savvas Learning
Prentice Hall Science & Math: Graphing Calculator Help
This site provides very complete help guides for a variety of graphing calculator models, complete with pictures and step-by-step instructions.
Other
Linear Functions, Slope and Regressions
Find activities here for linear functions, slopes and regression lines. Use them for classroom work or individual assignments.
Discovery Education
Discovery Education: Web Math: Graphing Parabolas
WebMath offers a java applet that allows you to input the equation of a parabola, in one of many forms, and gives you a graph of the parabola along with an explanation of how the graph was drawn.
Discovery Education
Discovery Education: Web Math: Graph a Circle
WebMath offers a java applet that allows you to input information about a circle, in one of four forms, and gives you the graph of the circle.
National Council of Teachers of Mathematics
Nctm: Illuminations: Geogebra: Dynagraphs
Explore relationships between inputs and outputs by manipulating interactive double number lines.
Math Open Reference
Math Open Reference: Graphical Function Explorer (Gfe)
This resource provides a free function grapher. Enter up to 3 equations and plot them. Similar to a graphing calculator.
Hofstra University
Hofstra University: Applied Calculus: Function Grapher
Students enter functions in standard mathematic notation and the tool creates a graph of the function. Multiple functions can be entered into the learning tool.
Other
Mathway: Graphing
Stuck on a particularly hard graphing problem? Just type your problem into this specialized graphing "calculator" and voila - problem solved!
GeoGebra
Geo Gebra: Graphing Calculator
Stuck on a particularly hard graphing problem? Just type your problem into this virtual graphing calculator and voila - problem solved!