119 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
23,246
Organizations
3,536
Software value
$25M
NumPy
NumPy is a Python library for numerical computing, providing support for multi-dimensional arrays, mathematical functions, and efficient operations on large datasets.
Contributors
10,038
Organizations
2,258
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
9,989
Organizations
2,053
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
6,540
Organizations
1,098
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
6,126
Organizations
1,126
Software value
$20M
SageMath
Main repository of SageMath
Contributors
3,762
Organizations
262
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
3,617
Organizations
870
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
3,567
Organizations
901
Software value
$6.8M
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
3,380
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
2,968
Organizations
700
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
2,764
Organizations
585
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
2,577
Organizations
558
Software value
$165M
PyMC
Bayesian Modeling and Probabilistic Programming in Python
Contributors
2,510
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
2,470
Organizations
267
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
2,293
Organizations
337
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
2,067
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
2,063
Organizations
380
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
1,843
Organizations
22
Software value
$272M
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
1,802
Organizations
417
Software value
$3.6M
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
1,788
Organizations
253
Software value
$293M
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
1,546
Organizations
475
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
$654M
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
1,357
Organizations
167
Software value
$69M
OpenMM
OpenMM is a toolkit for molecular simulation using high performance GPU code.
Contributors
1,349
Organizations
203
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
1,245
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
1,087
Organizations
94
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
1,038
Organizations
193
Software value
$7.2M
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
1,032
Organizations
107
Software value
$154M
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
1,020
Organizations
150
Software value
$32M
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
44
Software value
$75M
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
964
Organizations
142
Software value
$324M
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
958
Organizations
145
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
859
Organizations
53
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
858
Organizations
74
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
844
Organizations
66
Software value
$6.1M
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
819
Organizations
30
Software value
$48M
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
816
Organizations
291
Software value
$1.5M
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
789
Organizations
74
Software value
$199M
Firedrake
Firedrake is an automated system for the portable solution of partial differential equations using the finite element method (FEM)
Contributors
787
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
16
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
733
Organizations
47
Software value
$124M
netCDF4-python
netcdf4-python: python/numpy interface to the netCDF C library
Contributors
728
Organizations
203
Software value
$672K
SpikeInterface
A Python-based module for creating flexible and robust spike sorting pipelines.
Contributors
701
Organizations
56
Software value
$4.1M
FieldTrip
The MATLAB toolbox for MEG, EEG and iEEG analysis
Contributors
688
Organizations
70
Software value
$23M
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
662
Organizations
155
Software value
$1.9M
wxMaxima
A gui for the computer algebra system Maxima built with wxWidgets
Contributors
650
Organizations
87
Software value
$5.7M
Symbolics.jl
Symbolic programming for the next generation of numerical software
Contributors
642
Organizations
164
Software value
$563K
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
639
Organizations
172
Software value
$20M
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
42
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
599
Organizations
56
Software value
$12M
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
596
Organizations
54
Software value
$692M
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
585
Organizations
139
Software value
$6.4M
CaImAn
Computational toolbox for large scale Calcium Imaging Analysis, including movie handling, motion correction, source extraction, spike deconvolution and result visualization.
Contributors
557
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
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
QCoDeS
Modular data acquisition framework
Contributors
541
Organizations
45
Software value
$7.9M
DOLFINx
DOLFINx is a high-performance finite element library and computational framework for solving partial differential equations (PDEs). It is part of the FEniCS Project, providing efficient tools for automated solution of differential equations through high-level Python and C++ interfaces.
Contributors
489
Organizations
58
Software value
$2.4M
FreeSurfer
Neuroimaging analysis and visualization suite
Contributors
446
Organizations
62
Software value
$68M
Gammapy
A Python package for gamma-ray astronomy
Contributors
420
Organizations
53
Software value
$4.2M