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Top Apps

  • Communicate & Connect with Ring Central's VoIP Solution Communicate & Connect with Ring Central's VoIP Solution Icon
    Communicate & Connect with Ring Central's VoIP Solution Icon

    Cloud Powered Business Phone System

    • Unrivaled value & reliability in one solution
    • Unlimited Calls/SMS/Conferencing/Fax
    • Trusted by 350,000+ Businesses
  • WSJT

    Weak signal ham radio communication

    The WSJT project currently includes five programs designed for amateur radio communication using state of the art digital techniques. Typical applications include meteor scatter, EME ("moonbounce"), and QRP communication at HF. Summary Program Descriptions: WSJT: Modes JTMS, FSK441, ISCAT, JT6M, JT65, JT4, Echo, CW. Optimized for meteor scanner, ionospheric scatter, and EME at VHF/UHF/Microwaves. WSJT-X: Modes JT65, JT9. Primarily for use at HF. MAP65: For EME an VHF and higher frequencies. Implements a panoramic, polarization-matching receiver for JT65. WSPR: Probe potential propagation paths using low-power transmissions. WSPR-X: Experimental version of WSPR, including the slow mode WSPR-15. Source code is maintained here SourceForge. For installable end-user packages please go to the WSJT web site at the link below.

  • CFD Utilities Icon

    CFD Utilities

    CFD-related Fortran libraries and applications

    The CFD Utility Software Library (previously known as the Aerodynamics Division Software Library at NASA Ames Research Center) contains nearly 30 libraries of generalized subroutines and close to 100 applications built upon those libraries. These utilities have accumulated during four decades or so of software development in the aerospace field. All are written in Fortran 90 or FORTRAN 77 with potential reuse in mind. The only exception is the C translations of a dozen or so numerics routines grouped as C_utilities. David Saunders and Robert Kennelly are the primary authors, but miscellaneous contributions by others are gratefully acknowledged. See 1-line summaries of the libraries and applications under the Files menu. Each library folder also contains 1-line summaries of the grouped subroutines, while each application folder contains READMEs adapted from the main program headers. NASA permission to upload actual software was granted on Jan. 24, 2014.

    Downloads: 6,248 This Week Last Update: See Project
  • Developer's Image Library

    A full featured cross-platform image library

    Developer's Image Library (DevIL) is a cross-platform image library utilizing a simple syntax to load, save, convert, manipulate, filter and display a variety of images with ease.

  • APBS Icon


    APBS is a software package for the numerical solution of the Poisson-Boltzmann equation, a popular continuum model for describing electrostatic interactions between molecular solutes over a wide range of length scales. <>. Please register at before downloading!

  • Molecular Dynamics Studio

    Molecular Dynamics Cell Construction

    This is a collection of software modifications created to integrate NanoEngineer-1, PACKMOL and MSI2LMP for the purpose of easily creating molecular dynamics cells. NanoEngineer-1 is a molecular CAD software written by Nanorex and provides the user an easy way to create molecules, while the software modifications allow the user to type atoms using multiple force fields. PACKMOL can generate a random collection of molecules using the molecule templates from NanoEngineer-1 thus providing the initial MD cell. Modifications to PACKMOL allow the atom type data to be passed through to the MSI2LMP software. MSI2LMP creates a LAMMPS input file based on class I or class II force fields. MSI2LMP was modified to use numerically coded force field data generated by NanoEngineer-1. The MMP file format was extended and integrated into all three software applications.

  • MaxFEM Icon


    Software for electromagnetic simulation

    MaxFem is an open software package for electromagnetic simulation by using finite element methods. The package can solve problems in electrostatics, direct current, magnetostatics and eddy-currents. We have moved the installers to the MaxFEM website (see below). In order to improve MaxFEM, we will require you to fill out a simple form before downloading them.


    Build Systems for WSJT Applications

    JTSDK is a pre-configured collection of open source cross platform development frameworks, Gnu tools, libraries and custom written scripts designed to ease compiling WSJT applications and documentation from source code. WINDOWS APPLICATIONS ---------------------------------------------------------------------- * JTSDK-QT.......: WSJT-X, WSPR-X and MAP65 * JTSDK-PY........: WSJT and WSPR * JTSDK-DOC....: All WSJT Documentation * JTSDK-MSYS..: General Compiling LINUX APPLICATIONS ------------------------------------------------------------------ * JTSDK-Nix.......: WSJT, WSJT-X and WSPR

  • Perl Data Language Icon

    Perl Data Language

    The PDL module gives standard perl the ability to COMPACTLY store and SPEEDILY manipulate the large N-dimensional data sets that are the bread and butter of scientific computing.

  • CBFortran

    A customized distribution of Code::Blocks IDE for Fortran language

    Code::Blocks for Fortran is a customized distribution of the open-source Code::Blocks IDE which includes some enhancements for programming using Fortran language.

    Downloads: 183 This Week Last Update: See Project
  • Staden Package

    A fully developed set of DNA sequence assembly (Gap4 and Gap5), editing and analysis tools (Spin) for Unix, Linux, MacOSX and MS Windows.

    Downloads: 145 This Week Last Update: See Project
  • vaspkit

    A pre- and post-processing program for the VASP code

    Basic features: 1, Convert POSCAR or CONTCAR to cif or xsf format; 2, Extract the data of DOS and Band; 3, Extract Charge/Spin density (Open with VESTA ); 4, Linear optical properties; 5, Extract Fermi-Surface data; 6, and so on...

    Downloads: 96 This Week Last Update: See Project
  • Cantera Icon


    Cantera is a suite of object-oriented software tools for problems involving chemical kinetics, thermodynamics, and/or transport processes. It can be used from MATLAB, Python, C++, or Fortran.

    Downloads: 87 This Week Last Update: See Project
  • SWAN Icon


    SWAN is a third-generation wave model, developed at Delft University of Technology, that computes random, short-crested wind-generated waves in coastal regions and inland waters.

  • open_data_assimilation Icon


    Generic data-assimilation toolbox written in java, with native (c and fortran) libraries for high performance computing. Provides tools to couple to your own model and a wide range of algorithms, ranging from parameter calibration to Kalman filters.

  • Easy Beginner's Environment in QT

    This is a port of the ebe programming environment to QT.

    The ebe programming environment is a nice IDE designed for developing Assembly programs. It also handles C and C++ programs as well since there was not much extra effort. It used to support Fortran and this could return if people want Fortran. This project is an effort to recode ebe using C++ and QT. Originally ebe was coded using Python, Tkinter and Pmw, which worked out pretty well. The QT environment offers substantially better GUI controls. The most obvious difference is that Python ebe has a lot of separate windows, while the QT ebe will use 1 main window and a collection of dockable subwindows. This will make it easier to use.

    Downloads: 41 This Week Last Update: See Project
  • librsb Icon


    A shared memory parallel sparse matrix library including Sparse BLAS.

    librsb is a library for sparse matrix computations featuring the Recursive Sparse Blocks (RSB) matrix format. This format allows cache efficient and multi-threaded (that is, shared memory parallel) operations on large sparse matrices. The most common operations necessary to iterative solvers are available, e.g.: matrix-vector multiplication, triangular solution, rows/columns scaling, diagonal extraction / setting, blocks extraction, norm computation, formats conversion. The RSB format is especially well suited for symmetric and transposed multiplication variants. On these variants, librsb has been found to be faster than Intel MKL's implementation for CSR. Most numerical kernels code is auto generated, and the supported numerical types can be chosen by the user at build time. librsb implements the Sparse BLAS standard, as specified in the BLAS Forum documents.

    Downloads: 41 This Week Last Update: See Project
  • MCCCS Towhee

    Towhee is a Monte Carlo molecular simulation code originally designed for the prediction of fluid phase equilibria using atom-based force fields and the Gibbs ensemble with particular attention paid to algorithms addressing molecule conformation sampling.

  • HYPE

    hydrological model for simulation of water and water quality over time

    Please go to project home ( for more information. The hydrological model HYPE is developed at the Swedish Meteorological and Hydrological Institute (SMHI). The model simulates water, nutrients and other substances in small and large river catchments. Included in the project is HYSS, which is needed to run the model. It handles input and output and the simuation over time.

    Downloads: 35 This Week Last Update: See Project
  • FORTRAN Unit Test Framework (FRUIT)

    FORTRAN Unit Test Framework FRUIT - TDD in FORTRAN

    FORTRAN Unit Test Framework, written in FORTRAN 95. So that all FORTRAN features can be tested. FRUIT has assertion, fixture, setup, teardown, report, spec, driver generation. Rake used as build tool. Tutorials at The core testing part is in FORTRAN, this part can be used independent of the Ruby codes. The Ruby code is to make fixtures and reports easier. Rake is to build the project elegantly. This project also demonstrate a new way to build mixed language code in an alternative way than Make. Most of the FORTRAN are important in nature, used in nuclear and aerospace codes, etc, and maintained and written actively. Please help to bring TDD practices to the FORTRAN community. The change could be very hard, personally, I quit, since I could not make the change. I hope your organization will be successful. Enjoy a cup of fruit while maintaining FORTRAN ! Andrew Hang Chen and other maintainers who feel importance of TDD in cr

  • finFoil

    finFoil is an application to help amateur surfboard fin makers foil their fins properly. Check out the homepage for the latest news and tutorials: hrobeers


    RINGS "Rigorous Investigation of Networks Generated using Simulations" is a scientific code developed in Fortran90/MPI to analyze the results of molecular dynamics simulations. Its main feature is the analysis of the connectivity using ring statistics.

    Downloads: 32 This Week Last Update: See Project
  • pFUnit

    Unit testing framework for Fortran with MPI extensions

    pFUnit is a Fortran testing framework created by developers from NASA and NGC TASC. pFUnit offers a convenient, lightweight mechanism for Fortran developers to create and run software tests that specify the desired behavior for a given piece of code. See the website or wiki for more information.

  • Snd

    Snd is a sound editor

    Snd is a sound editor.


    Massively parallel software for quantum chemistry calculations

    Scalable Molecular Analysis Solver for High-performance computing systems (SMASH) is open-source software for massively parallel quantum chemistry calculations. It is currently capable of energy, analytical gradient, and geometry optimization calculations of Hartree-Fock theory and Density Functional Theory (DFT), and energy calculations of Second-order Moller-Plesset (MP2) perturbation theory. DFT calculations can be performed on 100,000 CPU cores of K Computer with high parallel efficiency.

    Downloads: 24 This Week Last Update: See Project
  • Systems Biology Software Project

    This site hosts the source code for C++ version of the Broker for SBW, NOM module, advanced simulation suite, analysis applications and model editors.

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