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
JuliaManifolds – Riemannian manifolds in Julia and applications thereon like optimization or differential equations
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
JuliaGPs - Gaussian Processes
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
JuliaQuantumControl — Framework for open-loop quantum optimal control
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
JuliaEPFL - Julia enthusiasts at and around École polytechnique fédérale de Lausanne (Switzerland)
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