Mathcad combines a powerful computational engine, accessed through conventional math notation, with a full-featured word processor and graphing tools.

USER NOTES ON FORTRAN PROGRAMMING (UNFP) (An open cooperative practical guide).

Compaq Computer Corporation, Houston, Texas.

Selected HP Fortran documentation for current product versions is available online for your convenience.

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. R provides a wide variety of statistical (linear and nonlinear modelling, classical statistical tests, time-series analysis, classification, clustering, ...) and graphical techniques, and is highly extensible. The S language is often the vehicle of choice for research in statistical methodology, and R provides an Open Source route to participation in that activity. One of R's strengths is the ease with which well-designed publication-quality plots can be produced, including mathematical symbols and formulae where needed. Great care has been taken over the defaults for the minor design choices in graphics, but the user retains full control.

The Numerical Recipes (NR) books are developed by Numerical Recipes Software and published by Cambridge University Press.

FreeBASIC - as the name suggests - is a completely free, open-source, 32-bit BASIC compiler, with the syntax the most compatible possible with MS-QuickBASIC, that adds new features such as pointers, unsigned data types, inline-assembly and many others.