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)

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

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