Stefan Goedecker's Free Software
Fast Fourier Transforms and Silicon interatomic potentials.
StopWatch
Fortran 90 module, by William Mitchell, for measuring execution time of program segments. It is designed to be a portable, easy-to-use means of measuring execution time.
Sugihara's Integer-Arithmetic Geometric Software
Geometric Software (by Kokichi Sugihara) for Voronoi diagrams in 2D and 3D, and convex hulls in 3D and 4D.
Texas KZK Time Domain Code
Fortran 77 time-domain computer code to model axisymmetric sound beams in fluids. The code is based on an augmented KZK equation that accounts for nonlinearity, diffraction, thermoviscous absorption, and absorption and dispersion due to an arbitrary number of relaxation phenomena.
Time Series, Climate Modeling, and other Code
By Richard Blender.
TLM3D
Code by J. L. Herring for transmission line modelling of electromagnetic fields in 3-dimensions using the symmetrical condensed node.
Token
Fortran 77 string tokenizer, similar to the C function.
Tomasz Plewa's Numerical methods directory
Directory of links to numerical analysis sites, many of which contain software.
TRIMHAP
Implements linkage disequilibrium mapping techniques.
Twist: a Compression Utility
Compression tool tailored for fields where node-to-node variations are small, and where undefined (dry) nodes are abundant.
Utilities in Fortran 90
Fortran 90 code by Michel Olagnon: pre-processor and pretty-printer, with command-line interface for Unix, fsplit utility for splitting large files into separate ones for each procedure, PostScript converter, interface bloc generator, and format creator for numeric strings.
Voigt and Complex Error Function
By F. Schreier.
Wavelet Analysis
Code to accompany book by Christopher Torrence and Gilbert P. Compo.
Weekday
Fortran 77 code to compute the day of the week of a date using the Zeller congruence algorithm.
Wild-card String Matching
Fortran 77 code by Clive Page to do wild-card matching to a pattern, which may contain "?" to match any single character, and "*" to match zero or more consecutive characters of any type.
XML
Module by Mart Rentmeester that reads and interprets XML in standard Fortran 95. Also at the site is code for varying length strings, the complementary error function, an interface to the GD Graphics Library, and nucleon-nucleon potential models.
xmlf90, an XML parser in Fortran90
Written by Alberto Garcia in the F subset of Fortran 95, freely available under the BSD license.
XML-Fortran
Aims to be a library that allows programmers to access XML files.
Alan R. Miller
Code from the book "Fortran Programs for Scientists and Engineers", 2nd. ed. (1988).
Algorithms
Codes by Julio F. Fernández for uniform and Gaussian random number generation, matrix diagonalization, and physical simulations.
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