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This straightforward Java applet parses statements from propositional logic and displays their truth tables in a format consistent with most discrete math texts.

A module that uses Riemann sums and other numerical methods to investigate of the area of a complex region, specifically, a map of Virginia

An article describing the WWW Interactive Mathematics Server (WIMS), designed for supporting intensive mathematics work via the Internet with server-side interactivity.

Chemical Graph theory is used to model physical properties of molecules called alkanes. Java applets allow for interactive exploration of molecules. A student project and discussion of its application are included, along with spreadsheets of model data.

This applet uses the free Flash player plug-in resident in most browsers to allow the user to plot a parametrically defined curve on a customized scale and dynamically rotate the three-dimensional picture.
A suite of mathlets for interactive exploration of quadric surfaces
This mathlet computes Riemann sums for a user-defined function and draws a graph of the function as well as a graphical represenatation of the approximations.
opinion essays from Loci editors
A Biological ESTEEM module in the BioInformatics Category. This workbook allows the analysis of sample or imported protein sequences.

An article discussing the use of technology in abstract analysis, real analysis, and geometry.