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RPy is a very simple, yet robust, Python interface to the R Programming Language. It can manage all kinds of R objects and can execute arbitrary R functions (including the graphic functions). All the errors from the R language are converted to Python exceptions. Any module that later were installed on the R system, can easily be used from within Python, without introducing any changes.

PLMan, or Propositional LogicMan, is a user-friendly and powerful propositional logic (sometimes called sentential logic or propositional calculus) sentence shell/interpreter written in Java, capable of handling many existing propositional systems of propositional logic, especially the important ones.

Ploticus is script-driven, which makes it suitable for automated, unattended uses, or for applications that will be run again and again. Ploticus might be your choice for stylistic reasons or just because it suits the problem or application. In general, ploticus is good at making graphs like you would see in newspapers and news magazines, business publications, journals for medical and social sciences, and so on. You can also use Ploticus in combination with standard desktop tools, e.g. generate data displays using ploticus then import SVG or PNG into PowerPoint, Word, etc.) Ploticus is not a function or mathematical plotting package like gnuplot, nor would it be a good choice for applications where mathematical formulas or scientific notations are to be rendered as an integral part of the data display. Ploticus is also not intended as a "marketing" graphics package. Its goal is to display data crisply without extra decoration and distracting "dingbats" that cloud the picture. Thus there is little support for 3-D effects, gradient backgrounds, and so on. FreeBSD note: the binary is referred to as 'pl' in the source files, but is installed as 'ploticus' so as to avoid conflicts with other ports.

C and Python code for basic probability and statistics - Combination - Permutation - Cartesian Product - Priority Queue

These are the Ada bindings for math/plplot, a cross-platform software package for creating scientific plots.

PLplot is a library of C functions that are useful for making scientific plots from a program written in C, C++, or Fortran. The PLplot library can be used to create standard x-y plots, semilog plots, log-log plots, contour plots, 3D plots, mesh plots, bar charts and pie charts. Multiple graphs (of the same or different sizes) may be placed on a single page with multiple lines in each graph. Different line styles, widths and colors are supported. A virtually infinite number of distinct area fill patterns may be used. There are almost 1000 characters in the extended character set. This includes four different fonts, the Greek alphabet and a host of mathematical, musical, and other symbols. The fonts can be scaled to any desired size. A variety of output devices are supported and new devices can be easily added by writing a small number of device dependent routines.

SVGMath is a command-line utility to convert MathML expressions to SVG, written entirely in Python.

FFC works as a compiler for multilinear forms by generating code (C++) for the evaluation of a multilinear form given in mathematical notation.

The FInite element Automatic Tabulator FIAT supports generation of arbitrary order instances of the Lagrange elements on lines, triangles, and tetrahedra.

Paraphrasing the website: Gato - the Graph Animation Toolbox - is software [toolkit] which visualizes algorithms on graphs. - Graphs are mathematical objects consisting of vertices, and edges connecting pairs of vertices. - Algorithms might find a shortest path - the fastest route - or a minimal spanning tree or solve one of other interesting problems on graphs: maximal-flow, weighted and non-weighted matching and min-cost flow. - Visualisation means linking cause - the statements of an algorithm - immediately to an effect - changes to the graph the algorithm has as its input - by terms of blinking, changing colors and other visual effects.