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Mpexpr adds two new commands to Tcl, 'mpexpr' and 'mpformat'. Mpexpr works much like Tcl's native 'expr', but does all calculations using an arbitrary precision math package. Mpexpr numbers can be any number of digits, with any decimal precision. Final precision is controlled by a Tcl variable 'mp_precision', which can be any reasonable integer, limiting only the number of digits to the right of the decimal point. Mpformat works much like Tcl's 'format', except it formats multiple precision numbers in a variety of formats. Mpexpr also includes most math functions provided by 'expr', as well as several new functions. Mpexpr also supports Tcl variables and nested evaluation, just like 'expr':

FreeMat is a free environment for rapid engineering and scientific prototyping and data processing. It is similar to commercial systems such as MATLAB from Mathworks, and IDL from Research Systems, but is Open Source.

JEuclid is a complete MathML rendering solution, consisting of: a MathViewer application, command line converters from MathML to other formats, an ant task for autmated conversion, display components for AWT and Swing and a component for Apache Cocoon.

The GraceTMPL classes provide an easy way to use existing grace-files as a template to format any number of graphs in a predefined way and save them as grace-files. This way you can apply the same graphical appearance to all of your data. In case your preferences change, you just alter the template and reformat your complete set of data within the shortest amount of time. The capabilities of GraceTMPL include: * The application using the GraceTMPL classes can define environment variables for the sheet, each graph and each dataset. The variables can be used in the template for dynamic string replacement. Even output filenames can be templated using variable substitution. * Datasets in the template file can be marked to be included in the destination files for easy reference. * Datasets can be tagged with arbitrary information strings to be interpreted by the application using GraceTMPL. This way information can be passed to the application on how to create the datasets and what kind of information is intended by the template author. * In case no template file is loaded by the application, GraceTMPL::Save will output plain sets of data tables which can easily be imported by XmGrace or other applications.

GNU Regression, Econometrics and Time-series Library Features - A wide variety of least-squares-based estimators (including two-stage least squares). - Easy, intuitive interface. - Single commands to launch things like augmented Dickey-Fuller test, Chow test for structural stability, Vector Autoregression. - Reads own format ascii data files, Comma Separated Values files, BOX1 files, own format binary databases (allowing mixed data frequencies and series lengths) and RATS 4 databases. Includes a US macro database and a perl script to create a database off economagic.com. See also the gretl data page. - Output models as LaTeX files, in tabular or equation format (not very flexible yet). - Integrated scripting language: enter commands either via the gui or via scripts. - Command loop structure for Monte Carlo simulations. - GUI controller for fine-tuning Gnuplot graphs. - Link to GNU R for further data analysis.

Gri is a language for scientific graphics applications. By 'language' I mean that it is a command-driven application, as opposed to a click/point application. It is analogous to latex or tex, and shares the property that extensive power is the reward for tolerating a modest learning curve. Gri output is in industry-standard PostScript, suitable for incorporation in documents prepared by various text processors. Gri can make x-y graphs, contour-graphs, and image graphs. In addition to high-level capabilities, it has enough low-level capabilities to allow users to achieve a high degree of customization. Precise control is extended to all aspects of drawing, including line-widths, colors, and fonts. Text includes a subset of the tex language, so that it is easy to incorporate Greek letters and mathematical symbols in labels.

Current answer set solvers work on variable-free programs. Hence, a grounder is needed that, given an input program with first-order variables, computes an equivalent ground (variable-free) program. Gringo is such a grounder. Its output can be processed further with clasp.

The Helsinki Finite-State Transducer toolkit is intended for processing natural language morphologies. The toolkit is demonstrated by wide-coverage implementations of a number of languages of varying morphological complexity.

ised is a command-line tool for generating number sequences and arithmetic evaluation. Unlike big gui-based software (e.g. Mathematica, Derive, Matlab, Octave,...) it is intended for use in shell scripting, together with gnu core utilities. Its main advantage is that all functions are generalized to operate on one-dimensional arrays. It can be used for loop indexing (much like seq), line-by-line arithmetic processing of files, floating point math for shells that don't support it natively, or interactively, as extended calculator.

Lybniz is an easy to use mathematical function graph plotter using pyGTK.