Sites

Multivariable Calculus Applets (Popularity: )
http://www.math.ucla.edu/~ronmiech/crew/eugene/java/
Features graphing gradients, parametric, and polar curves, matrix manipulation, and a tutorial on determinants.

Multivariable Calculus (Popularity: )
http://www.math.gatech.edu/~cain/notes/calculus.html
Textbook by George Cain and James Herod. Chapters in PDF.

4DLab - Easy equation plotting for real, complex, and transcomplex numbers (Popularity: )
http://4DLab.info
4DLab is a web site focused on complex and transcomplex numbers. Sections on free math E-Books, articles about the mathematical fourth dimension, and the Cartesian spaces.

Multivariable Calculus Problems (Popularity: )
http://www.ma.iup.edu/MathDept/Projects/CalcDEMma/veccalc/veccalc.html
Various calculus problems are solved and plotted on a 3D graph.

Multivariable Calculus Examples (Popularity: )
http://www.dpgraph.com/MCExamples/MCExamples.html
An interactive tutorial of multivariable calculus. A lot of work with graphics. Requires the use of DPG programming to participate in the examples.

Multivariable Calculus (Popularity: )
http://omega.albany.edu:8008/calc3/toc.html
A nicely organized and detailed study of calculus of 3 or more variables topics. Includes a review of minimum and maximum problems and vectors.

Multivariate Calculus (Popularity: )
http://www.swarthmore.edu/NatSci/smaurer1/Math18H/multivarH.html
Features problem sets for different topics. Includes a brief introduction to each topic. Uses pdf or dvi files.