132 projects
Pandas
Flexible and powerful data analysis / manipulation library for Python, providing labeled data structures similar to R data.frame objects, statistical functions, and much more
Contributors
23,357
Organizations
3,547
Software value
$26M
NumPy
NumPy is a Python library for numerical computing, providing support for multi-dimensional arrays, mathematical functions, and efficient operations on large datasets.
Contributors
10,108
Organizations
2,271
Software value
$24M
SciPy
SciPy is a Python library that builds on NumPy to provide advanced algorithms for scientific computing, including optimization, integration, signal processing, and linear algebra.
Contributors
10,037
Organizations
2,059
Software value
$30M
SymPy
SymPy is a Python library for symbolic mathematics that provides computer algebra system (CAS) capabilities. It enables users to perform symbolic calculations, algebraic manipulations, calculus operations, and mathematical computations with exact precision rather than numerical approximations.
Contributors
6,621
Organizations
1,102
Software value
$25M
JAX
JAX is a high-performance numerical computing and machine learning library that combines Numpy's familiar API with GPU and TPU hardware acceleration. It features automatic differentiation, just-in-time compilation, and enables writing transformable numerical programs.
Contributors
6,185
Organizations
1,132
Software value
$20M
SageMath
Main repository of SageMath
Contributors
3,779
Organizations
268
Software value
$100M
Numba
Numba is a Just-In-Time (JIT) compiler that translates a subset of Python and NumPy code into fast machine code, specializing in numerical computing and scientific applications. It enables Python functions to be compiled to native machine instructions, significantly improving performance for computationally intensive operations.
Contributors
3,629
Organizations
875
Software value
$9.9M
Dask
Dask is a flexible parallel computing library for analytics that provides dynamic task scheduling optimized for computation and integrates with Python data science libraries like NumPy, Pandas and Scikit-learn. It enables parallel and distributed computing through intuitive APIs and scales Python code from multi-core machines to clusters.
Contributors
3,575
Organizations
902
Software value
$6.9M
statsmodels
Statsmodels is a Python library for statistical modeling and econometrics that provides classes and functions for estimating various statistical models, conducting statistical tests, and exploring statistical data. It includes linear regression models, time series analysis, discrete choice models, and many other statistical methods.
Contributors
3,395
Organizations
606
Software value
$24M
xarray
Xarray is a Python library that introduces labeled arrays and datasets, extending NumPy's capabilities by adding coordinates, dimensions, and attributes to N-dimensional arrays. It enables working with multi-dimensional data by providing data structures and operations for labeled arrays, making it particularly useful for scientific computing and analysis of structured data like climate and weather data.
Contributors
2,981
Organizations
705
Software value
$6.5M
Astropy
Astropy is a core package for astronomy in Python that provides tools and functionality for performing astronomical calculations, handling astronomical data, working with coordinates, time, units, and other common astronomy-related tasks. It serves as a foundational library for the astronomical computing ecosystem.
Contributors
2,783
Organizations
590
Software value
$20M
OpenBLAS
OpenBLAS is a high-performance open-source implementation of the Basic Linear Algebra Subprograms (BLAS) library, optimized for various processor architectures. It provides efficient matrix and vector operations essential for scientific computing, machine learning, and numerical analysis.
Contributors
2,590
Organizations
563
Software value
$165M
PyMC
Bayesian Modeling and Probabilistic Programming in Python
Contributors
2,523
Organizations
461
Software value
$3.3M
Qiskit
Qiskit is an open-source software development kit for quantum computing that enables users to create, manipulate and run quantum circuits on quantum computers and simulators. It provides tools for quantum programming, algorithm development, hardware access, and quantum education.
Contributors
2,500
Organizations
271
Software value
$17M
RDKit
RDKit is an open-source cheminformatics and machine learning software toolkit that provides functionality for processing, analyzing, and manipulating chemical structures. It includes tools for 2D and 3D molecular operations, chemical fingerprinting, molecular descriptor calculation, substructure searching, and integration with popular data science frameworks.
Contributors
2,306
Organizations
342
Software value
$49M
MOOSE
MOOSE (Multiphysics Object-Oriented Simulation Environment) is a finite element framework developed by Idaho National Laboratory for solving complex engineering and scientific problems. It provides a flexible, parallel computational framework for coupled systems of nonlinear partial differential equations.
Contributors
2,079
Organizations
78
Software value
$101M
Biopython
Biopython is an open-source library of tools for biological computation written in Python. It provides modules for working with biological sequences, file parsers for various bioinformatics file formats, access to online biological databases, and tools for performing common bioinformatics operations.
Contributors
2,075
Organizations
381
Software value
$62M
AliPhysics
AliPhysics is a physics analysis framework for analyzing data from high-energy particle physics experiments, particularly focused on heavy-ion collisions. It provides tools and algorithms for particle reconstruction, event analysis, and data processing in nuclear physics research.
Contributors
1,833
Organizations
25
Software value
$272M
ROOT
ROOT is a scientific software framework developed at CERN that provides tools for big data processing, statistical analysis, visualization and storage in high-energy physics research. It includes a C++ interpreter, advanced statistical tools, machine learning capabilities, and powerful graphics tools for data visualization.
Contributors
1,800
Organizations
253
Software value
$293M
Math.js
Math.js is an extensive mathematics library for JavaScript that provides a flexible expression parser and offers support for symbolic computation, complex numbers, units, matrices, and a wide range of mathematical functions. It can be used both in Node.js and in web browsers.
Contributors
1,798
Organizations
428
Software value
$3.6M
h5py
h5py is a Pythonic interface to the HDF5 binary data format, providing a high-level interface for storing and organizing large amounts of numerical data. It allows Python programs to store huge amounts of numerical data in a hierarchical format, and efficiently manipulate that data from NumPy.
Contributors
1,540
Organizations
476
Software value
$1.1M
Trilinos
The mission of the Project is the creation of algorithms and enabling technologies for the solution of large-scale, complex multi-physics engineering and scientific problems on new and emerging high-performance computing (HPC) architectures. The Project is composed of packages addressing various computational needs of engineering and scientific simulations.
Contributors
1,370
Organizations
118
Software value
$658M
LAMMPS
LAMMPS (Large-scale Atomic/Molecular Massively Parallel Simulator) is a classical molecular dynamics simulation code designed to efficiently compute atomic, polymeric, biological, metallic, granular, and coarse-grained systems using various interatomic potentials and boundary conditions on parallel computers.
Contributors
1,362
Organizations
168
Software value
$69M
OpenMM
OpenMM is a toolkit for molecular simulation using high performance GPU code.
Contributors
1,356
Organizations
204
Software value
$40M
Pymatgen
Pymatgen (Python Materials Genomics) is a robust, open-source Python library for materials analysis. It provides core functionality for analyzing materials science data, performing crystallographic operations, generating phase diagrams, and analyzing electronic structures. The library serves as a key component in the Materials Project ecosystem for computational materials science research.
Contributors
1,246
Organizations
132
Software value
$49M
MFEM
MFEM is a free, lightweight, scalable C++ library for finite element methods. It provides high-performance mathematical algorithms for finite element discretization, linear algebra operations, mesh representation, and parallel computing capabilities for solving partial differential equations.
Contributors
1,089
Organizations
95
Software value
$18M
NIPYPE
NIPYPE is a Python-based neuroimaging data processing framework that provides a uniform interface to existing neuroimaging software and facilitates interaction between these packages within a single workflow. It enables reproducible, distributed analysis of neuroimaging data through workflows and interfaces to commonly used neuroimaging tools.
Contributors
1,037
Organizations
191
Software value
$7.2M
Drake
Drake is a robotics toolbox and model-based design tool for analyzing and controlling robotic systems. It provides a comprehensive suite of tools for simulation, optimization, and control of complex robotic systems, with support for rigid body dynamics, trajectory optimization, and control system design.
Contributors
1,026
Organizations
154
Software value
$32M
deal.II
deal.II is an open-source finite element analysis library designed for computational science and numerical simulations. It provides tools and algorithms for solving partial differential equations using adaptive finite element methods, with particular focus on scientific computing and engineering applications.
Contributors
1,026
Organizations
112
Software value
$154M
stdlib
stdlib is a comprehensive standard library for JavaScript and Node.js that provides a collection of mathematical, statistical, and scientific computing functions, along with utilities for data processing, machine learning, and numerical computing
Contributors
1,017
Organizations
146
Software value
$334M
Energy Exascale Earth System Model (E3SM)
The Energy Exascale Earth System Model (E3SM) is a state-of-the-art Earth system model developed for high-performance computing to address challenging climate science problems. It focuses on modeling Earth's water cycle, biogeochemistry, and cryosphere systems at high resolution.
Contributors
989
Organizations
45
Software value
$75M
ITK
ITK (Insight Toolkit) is an open-source, cross-platform library providing an extensive suite of software tools for image analysis, focusing on medical image processing and registration. It offers algorithms for segmentation, registration, filtering, and analysis of multi-dimensional scientific images.
Contributors
957
Organizations
148
Software value
$77M
SU2
SU2 is an open-source suite of tools for performing computational fluid dynamics (CFD) simulations and solving partial differential equations. It is designed for aerodynamic shape optimization and is capable of simulating compressible, incompressible, and multiphysics flows.
Contributors
870
Organizations
55
Software value
$21M
OpenModelica
OpenModelica is an open-source Modelica-based modeling and simulation environment intended for industrial and academic usage. It supports model-based design and simulation of complex physical systems in multiple domains including mechanical, electrical, electronic, hydraulic, thermal, control, and electric power systems.
Contributors
862
Organizations
75
Software value
$70M
PyBaMM
PyBaMM (Python Battery Mathematical Modelling) is an open-source battery simulation package that enables fast and flexible simulations of battery models. It provides a unified framework for implementing and solving various physics-based battery models, from simple lumped parameter models to complex multiphysics simulations.
Contributors
853
Organizations
67
Software value
$6.2M
Zarr
Zarr is a format and library for chunked, compressed N-dimensional arrays, designed for efficient storage and access of large scientific datasets. It provides a Python implementation with support for cloud storage, parallel computing, and hierarchical organization of arrays.
Contributors
825
Organizations
292
Software value
$1.5M
ALICE O2
ALICE O2 (Online-Offline) is a computing system and software framework for the ALICE experiment at CERN. It handles data acquisition, reconstruction, calibration, and analysis for high-energy physics experiments, specifically designed to process data from heavy-ion collisions at the Large Hadron Collider.
Contributors
814
Organizations
32
Software value
$48M
Psi4
Open-Source Quantum Chemistry – an electronic structure package in C++ driven by Python
Contributors
809
Organizations
112
Software value
$29M
AMReX
The mission and charitable purposes (collectively, the “Charitable Purposes”) of the Project is to provide a parallel, performance-portable block-structured adaptive mesh refinement framework for science and engineering applications.
Contributors
794
Organizations
75
Software value
$185M
Firedrake
Firedrake is an automated system for the portable solution of partial differential equations using the finite element method (FEM)
Contributors
789
Organizations
85
Software value
$10M
GEOS-Chem
GEOS-Chem is a global 3-D chemical transport model for atmospheric composition that simulates atmospheric chemistry, aerosols, and greenhouse gases. It is used by research groups worldwide for studying atmospheric chemistry and composition, air quality, and climate change.
Contributors
741
Organizations
19
Software value
$18M
Kratos Multiphysics
Kratos Multiphysics is an open-source framework for the implementation of numerical methods for solving engineering problems, particularly focused on finite element methods, computational fluid dynamics, and structural mechanics. It provides a unified environment for multi-physics simulations with parallel processing capabilities.
Contributors
736
Organizations
46
Software value
$124M
netCDF4-python
netcdf4-python: python/numpy interface to the netCDF C library
Contributors
733
Organizations
205
Software value
$674K
SpikeInterface
A Python-based module for creating flexible and robust spike sorting pipelines.
Contributors
702
Organizations
56
Software value
$4.1M
FieldTrip
The MATLAB toolbox for MEG, EEG and iEEG analysis
Contributors
688
Organizations
70
Software value
$23M
WRF
The Weather Research and Forecasting (WRF) Model is a next-generation mesoscale numerical weather prediction system designed for both atmospheric research and operational forecasting applications. It features multiple dynamical cores and a software architecture allowing for parallel computation and system extensibility.
Contributors
667
Organizations
59
Software value
$49M
ModelingToolkit.jl
ModelingToolkit.jl is a symbolic modeling framework for scientific computing and automated model transformation in Julia. It enables users to define, manipulate, and solve complex mathematical models through symbolic computation, automatic differentiation, and code generation capabilities.
Contributors
660
Organizations
156
Software value
$2.1M
wxMaxima
A gui for the computer algebra system Maxima built with wxWidgets
Contributors
651
Organizations
88
Software value
$5.7M
Unidata NetCDF
NetCDF (Network Common Data Form) is a set of software libraries and machine-independent data formats that support the creation, access, and sharing of array-oriented scientific data. This C implementation provides the reference library and tools for working with NetCDF files, enabling efficient storage and retrieval of multi-dimensional scientific data.
Contributors
640
Organizations
170
Software value
$20M
Symbolics.jl
Symbolic programming for the next generation of numerical software
Contributors
639
Organizations
167
Software value
$584K
OpenMC
OpenMC Monte Carlo Code
Contributors
632
Organizations
58
Software value
$6.8M
CP2K
Quantum chemistry and solid state physics software package
Contributors
613
Organizations
84
Software value
$39M
Mantid
Mantid (Manipulation and Analysis Toolkit for Instrument Data) is a scientific software framework for processing and analyzing neutron and muon scattering data from large-scale facilities. It provides tools for data reduction, visualization, and analysis used by scientists at neutron and muon sources worldwide.
Contributors
601
Organizations
41
Software value
$93M
WarpX
The mission and charitable purposes (collectively, the “Charitable Purposes”) of the Project is to provide a community, performance-portable and modular Particle in-Cell code with advanced algorithms.
Contributors
601
Organizations
56
Software value
$12M
OrdinaryDiffEq.jl
OrdinaryDiffEq.jl is a high-performance solver package for ordinary differential equations (ODEs) in Julia. It provides a comprehensive suite of numerical methods for solving various types of ODEs, including stiff and non-stiff problems, with features for automatic algorithm selection and performance optimization.
Contributors
584
Organizations
140
Software value
$7M
CaImAn
Computational toolbox for large scale Calcium Imaging Analysis, including movie handling, motion correction, source extraction, spike deconvolution and result visualization.
Contributors
561
Organizations
66
Software value
$1.5M
PyCBC
Core package to analyze gravitational-wave data, find signals, and study their parameters. This package was used in the first direct detection of gravitational waves (GW150914), and is used in the ongoing analysis of LIGO/Virgo data.
Contributors
555
Organizations
38
Software value
$13M
QCoDeS
Modular data acquisition framework
Contributors
543
Organizations
45
Software value
$7.9M
Stan
Stan is a state-of-the-art platform for statistical modeling and high-performance statistical computation. It provides a probabilistic programming language for specifying statistical models and implements gradient-based Markov Chain Monte Carlo (MCMC) sampling for Bayesian inference.
Contributors
543
Organizations
108
Software value
$3.3M
PowSyBl
PowSyBl (Power System Blocks) is an open source library dedicated to electrical grid modeling and simulation. PowSyBl is written in Java and licensed under the Mozilla Public License 2.0. PowSyBl may be scripted for a quick solution, but it can also be used as a library to write complex software for power system simulation and analysis. Using PowSyBl, developers can create applications able to perform dynamic power flow simulations and security analyses on the network, handle a variety of formats including CGMES for European data exchanges, and many other tasks. PowSyBl has a completely modular design, enabling developers to extend or customize its features by providing their own plugins. Modularity is a key value of PowSyBl’s open source design.
Contributors
511
Organizations
54
Software value
$692M