- Contour Diagram Plotter and 3D Function Grapher Applets
- Parametric Curves in the Plane Plotter
- Parametric curves in space plotter
- Parametric Surfaces in Rectangular Coordinates
- Spherical Coordinates
- Riemann sums
- Double integral as volume
- Iterated integrals
- Double Integrals in Rectangular and Polar Coordinates
- Cylindrical coordinates
- Integrating in cylindrical coordinates
- Spherical coordinates
- Integrating in spherical coordinates
- Change of variables - double integrals
- Triple integral examples
- Change of variables - triple integrals
- Lots of examples, from the University of Minnesota
- Monkey saddle - not this, but this
Derivatives
- Directional derivatives, from the University of Minnesota
- The gradient and directional derivatives
- Lagrange multipliers
Maple