Links
 GGobi is an open source visualization program for exploring highdimensional data. It provides highly dynamic and interactive graphics such as tours, as well as familiar graphics such as the scatterplot, barchart and parallel coordinates plots. Plots are interactive and linked with brushing and identification.
 R is a language and environment for statistical computing and graphics. It is a GNU project which is similar to the S language and environment which was developed at Bell Laboratories (formerly AT&T, now Lucent Technologies) by John Chambers and colleagues. R can be considered as a different implementation of S. There are some important differences, but much code written for S runs unaltered under R.

Paul Bourke's 'Surfaces and Curves' website contains a large assortment of objects and knots mapped in 3D.

The package allows one or two players to play the game of faceoff on a four dimensional cube through the use of rggobi in GGobi. The package is available for download on CRAN. Run function faceoff().
 LaTeX is a document preparation system for highquality typesetting. It is most often used for mediumtolarge technical or scientific documents but it can be used for almost any form of publishing.