Something unique about the Julia Language is the way the community self organizes into GitHub Organizations. This allows for a higher degree of collaboration and structure that ultimately enables each of these communities to be self sustaining.

The following is a non-comprehensive list of Julia GitHub organizations, grouped by domain. If you know of an organization not shown here, please open a pull request so that we can keep the list up to date.

JuliaLang – A fresh approach to numerical computing

JuliaCon – The Julia Conference

JuliaAcademy – The definitive source for learning all things Julia.

JuliaCommunity – Organizing Julia Community Initiatives

Julia Lab - Julia Lab at MIT CSAIL

InPhyT - Research group developing data management pipelines and complex systems modeling frameworks in Julia

Julia-i18n – Internationalization (i18n) and localization (L10n) for Julians (Twitter, Gitter)

JuliaCollections – Collections, Data Structures, and Algorithms for Julia

JuliaDocs – Documentation-related packages for Julia (Gitter)

JuliaEditorSupport – Extensions/Plugins for text editors and IDEs

JuliaImages – Julia packages for image processing

JuliaPackaging – Tooling for Julia's binary packages and dependencies

JuliaPluto – Packages related to the Pluto.jl notebook

JuliaPraxis – Best practices (Gitter)

JuliaPy – Software that connects the Julia and Python languages.

Julia Testing - Testing tools for the Julia language

JuliaTime – Date and time libraries

Julia Visual Studio Code - The Julia extension for Visual Studio Code provides rich support for the Julia programming language

JunoLab – The Juno IDE for Atom

JuliaActors – Concurrent Programming with the Actor Model

JuliaArrays – Custom array types (and utilities for building array types)

JuliaCI – Continuous Integration Support for Julia packages

JuliaCloud – Cloud providers

JuliaGPU – GPU computing

JuliaInterop – Easy interoperability between Julia and not-Julia

JuliaIO – IO-related functionality, such as serialization

JuliaPerf - Performance tools

JuliaSIMD - SIMD vectorization in Julia

JuliaWeb – Web stack

AlgebraicJulia – Applied Category Theory

JuliaFirstOrder - First-order optimization and proximal algorithms

JuliaGeometry – Computational Geometry

JuliaGraphs – Graph Theory and Implementation

JuliaIntervals – Rigorous numerics with interval arithmetic & applications

JuliaLinearAlgebra – Linear algebra in Julia

JuliaMath – Mathematics made easy in Julia

JuliaNonconvex – Non-convex constrained optimization

JuliaSmoothOptimizers – Framework for the development of solvers for continuous nonlinear optimization

JuliaSparse – Sparse matrix solvers

JuMP-dev (formerly JuliaOpt) – JuMP is a modeling language and supporting packages for mathematical optimization in Julia

SciML (formerly JuliaDiffEq) – Open source software for scientific machine learning (Gitter)

trixi-framework - The Trixi framework is a collaborative scientific effort to provide open source tools for adaptive high-order numerical simulations of hyperbolic PDEs in Julia. Besides the core algorithms, the framework also includes mesh and visualization tools. Moreover, it includes utilities such as Julia wrappers of mature libraries written in other programming languages.

BioJulia – Biology, bioinformatics, computational biology (Gitter)

Climate Modeling Alliance (CliMA) - An alliance of scientists, engineers and applied mathematicians, dedicated to pioneering a new, data-informed approach to climate modeling

EcoJulia – Ecology

JuliaActuary – Actuarial Science

JuliaClimate - Climate data management and simulation modeling tools in Julia

JuliaControl – Control Systems Design in Julia

JuliaCrypto – Cryptography made easy in Julia

JuliaDSP – Digital signal processing

JuliaDynamics – Dynamical systems, nonlinear dynamics and chaos.

JuliaEarth – Fostering statistics research in Earth sciences

JuliaEpi – Computational epidemiology in Julia

JuliaFEM – Finite Element Method

JuliaGeo – Earth science, geospatial data processing

JuliaIBM - Immersed boundary methods and other tools for solving partial differential equations

JuliaMolSim – Molecular Simulation in Materials Science and Chemistry

Julia POMDP - POMDP packages for Julia

JuliaQuant – Finance

JuliaReach – Reachability analysis, set propagation techniques, hybrid systems (Gitter)

JuliaRobotics - A collection of robotics-related packages that focus on robot control, simulation, navigation, and visualization

ModiaSim – Physical systems modelling/simulation with differential & algebraic equations

juliahci – High-contrast imaging

JuliaAtoms - Atomic physics in Julia

JuliaPhysics – Physics

JuliaWaveScattering – Linear wave equations (acoustic, elastic, electromagnetic, quantum)

JuliaQuantum – Quantum science and technology

qojulia – QuantumOptics.jl related projects

QuantumBFS - A group of quantum developers around Bao Fu Si (Temple)

FluxML - Machine Learning and Differentiable Programming Framework

JuliaAI - Home for repositories in the MLJ (Machine Learning in Julia) project

JuliaData – Data manipulation, storage, and I/O in Julia

JuliaDatabases – Various database drivers for Julia

JuliaImages – Image Processing

JuliaText – Natural Language Processing (NLP), Computational Linguistics and (textual) Information Retrieval

queryverse – Julia Packages for Data Science

TAIJA – Home for repositories of the Taija (Trustworthy Artificial Intelligence in Julia) project

TuringLang – Bayesian inference with probabilistic programming

GiovineItalia – Plotting (with Gadfly)

JuliaGraphics – Drawing, Colors, GUIs

JuliaCN - An open-source organization for Julia localization in Chinese

JuliaGaming – Open source games built in the Julia Programming Language.

JuliaKorea - Julia Korea organization

JuliaLangSlack – Projects built to enable the Julia Lang community Slack workspace

JuliaStaging - Utilities to analyze, generate and evaluate Julia code for multi-stage scenarios

JuliaSymbolics - A fast and modern CAS for a fast and modern language

JuliaTokyo - Yet another Julialang community.

Julia-Streamers – The official organization for the Julia Streaming community!

QuantEcon - Open source code for quantitative economic modeling