Links 
Math
2A Multivariate Calculus Fall 2007 
Vector Calculus Links
Xah Lee has a collection of interesting vector calculus related info. The Virtual Math Museum is interesting. He's got a page of great math softwares that includes many interesting links. Try the SpaceCurveExplorer and The ParametricSurfaceViewer applets on the Virtual Labs page.
On his TechBlog, Yanto Suryano has posted an Surface Plotter applet for plotting surfaces that's simple and to the point. He includes the source code, if you're interested in that.
Jeff Knisely's applet is nice, except it doesn't always work (?):
http://butlercc.edu/mathematics/Utilities/tools_multivariable_knisley/
Nestled in the charming village of South Orange, New Jersey, Seton Hall University is only 14 miles from New York City, one of the world's most exciting cities and has a fine Math and Computer Science program.Their plotter is very nice, except that while you drag the surface plot, it disappears.
http://sciris.shu.edu/thinklets/Math/Calculus/SurfacePlotter/Surface.html
MIT's math department has a
collection of calculus pages here you can get into from here:
David Little at Penn State has a nice space curve applet you can also
download locally, they say. It shows little plane panels of the
three x, y and z functions in windows at the top.
http://www.math.psu.edu/dlittle/java/calculus/spacecurves.html
At Jackson State University, you can
drag and see simultaneously!
http://cs.jsu.edu/mcis/faculty/leathrum/Mathlets/parapath.html
Matthias Kowski at Arizona State University
set up this interesting applet: a Vector Field Analyzer which can really
help build your intuitive sense of vector fields and their equations.
Here are some links:
http://math.la.asu.edu/~kawski/vfa2/index.html
Using Maple.

http://omega.albany.edu:8008/calc3/toc.html
http://www.stolaf.edu/people/zorn/ozcalc/curveexamples.txt
http://math.etsu.edu/MultiCalc/intro/intro2.htm
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Compare the derivation of how to find the osculating plane in example 7 of
10.3 in the Concepts and Context book found here
http://www.stewartcalculus.com/data/ESSENTIAL%20CALCULUS%20Early%20Transcendentals/upfiles/examples/ess_ae_1008.pdf
with this explanation of how to solve the same problem:
http://www.math.gatech.edu/~hurley/math2401f06/f05test1a.pdf
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