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Beginner Friendly Open-Source Julia

Good First Issues in Julia

Explore curated starter issues in high-scoring Julia repositories. Every listed issue belongs to a welcoming repository scored by C-Rankâ„¢ on PR merge rates, review responsiveness, and first-timer acceptance.

Updated: Sun, 30 Aug 2026 UTC (Live GitHub Sync)
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No active good first issues found for Julia.

Top Julia Repositories with Beginner Issues (20)

Updated Daily via GitHub GraphQL
JuliaEditorSupport
JuliaFormatter.jl
JuliaEditorSupport/JuliaFormatter.jl
S•Elite
643·JUJulia

An opinionated code formatter for Julia. Plot twist - the opinion is your own.

#cst#formatter#formatting
90%
Merge Rate
1d
Review Time
83%
1st-Timers
4 GFI
Scorecard
ClapeyronThermo
Clapeyron.jl
ClapeyronThermo/Clapeyron.jl
A•Welcoming
292·JUJulia

Clapeyron provides a framework for the development and use of fluid-thermodynamic models, including SAFT, cubic, activity, multi-parameter, and COSMO-SAC.

#cosmo-sac#equation-of-state#julia
82%
Merge Rate
6h
Review Time
100%
1st-Timers
1 GFI
Scorecard
Roger-luo
Moshi.jl
Roger-luo/Moshi.jl
B•Solid
111·JUJulia

nextgen MLStyle: Generic Algebraic Data Type + Pattern Match

#algebraic-data-types#julia#pattern-matching
100%
Merge Rate
7h
Review Time
100%
1st-Timers
1 GFI
Scorecard
JuliaBesties
BestieTemplate.jl
JuliaBesties/BestieTemplate.jl
A•Welcoming
127·JUJulia

Template for Julia Programming Language packages using the copier engine.

#best-practices#code-quality#copier
97%
Merge Rate
2d
Review Time
100%
1st-Timers
1 GFI
Scorecard
qutip
QuantumToolbox.jl
qutip/QuantumToolbox.jl
A•Welcoming
170·JUJulia

Quantum Toolbox in Julia

#julia#lindblad#lindblad-master-equation
86%
Merge Rate
21h
Review Time
100%
1st-Timers
1 GFI
Scorecard
JuliaPhysics
SolidStateDetectors.jl
JuliaPhysics/SolidStateDetectors.jl
A•Welcoming
174·JUJulia

Solid state detector field and charge drift simulation in Julia

#charge-transport#germanium-detector#julia
91%
Merge Rate
<1h
Review Time
100%
1st-Timers
1 GFI
Scorecard
JuliaGeometry
Meshes.jl
JuliaGeometry/Meshes.jl
A•Welcoming
472·JUJulia

Computational geometry in Julia

#computational-geometry#geometry-algorithms#geometry-processing
80%
Merge Rate
10d
Review Time
57%
1st-Timers
2 GFI
Scorecard
Ferrite-FEM
Ferrite.jl
Ferrite-FEM/Ferrite.jl
A•Welcoming
451·JUJulia

Finite element toolbox for Julia

#finite-elements#hacktoberfest#julia
71%
Merge Rate
18h
Review Time
63%
1st-Timers
9 GFI
Scorecard
dillondaudert
UMAP.jl
dillondaudert/UMAP.jl
B•Solid
145·JUJulia

Uniform Manifold Approximation and Projection (UMAP) implementation in Julia

#dimensionality-reduction#julia#machine-learning
100%
Merge Rate
<1h
Review Time
100%
1st-Timers
1 GFI
Scorecard
TuringLang
DynamicPPL.jl
TuringLang/DynamicPPL.jl
B•Solid
279·JUJulia

Implementation of domain-specific language (DSL) for dynamic probabilistic programming

#probabilistic-programming#probability-theory
77%
Merge Rate
9d
Review Time
86%
1st-Timers
1 GFI
Scorecard
jump-dev
DiffOpt.jl
jump-dev/DiffOpt.jl
A•Welcoming
144·JUJulia

Differentiating optimization programs w.r.t. program parameters

#differentiable-programming#julia#mathematical-modelling
65%
Merge Rate
1d
Review Time
75%
1st-Timers
1 GFI
Scorecard
SciML
Catalyst.jl
SciML/Catalyst.jl
A•Welcoming
525·JUJulia

Chemical reaction network and systems biology interface for scientific machine learning (SciML). High performance, GPU-parallelized, and O(1) solvers in open source software.

#biology#chemical-reactions#differential-equations
65%
Merge Rate
1d
Review Time
83%
1st-Timers
2 GFI
Scorecard
JuliaGPU
CUDA.jl
JuliaGPU/CUDA.jl
A•Welcoming
1.4k·JUJulia

CUDA programming in Julia.

#cuda#gpu#hacktoberfest
83%
Merge Rate
5d
Review Time
77%
1st-Timers
1 GFI
Scorecard
LuxDL
DocumenterVitepress.jl
LuxDL/DocumenterVitepress.jl
A•Welcoming
126·JUJulia

Documentation with Documenter.jl and VitePress

#documentation#julia#vitepress
79%
Merge Rate
10d
Review Time
100%
1st-Timers
2 GFI
Scorecard
JuliaLang
julia
JuliaLang/julia
B•Solid
49.0k·JUJulia

The Julia Programming Language

#hacktoberfest#hpc#julia
65%
Merge Rate
1d
Review Time
49%
1st-Timers
2 GFI
Scorecard
JuliaIO
JLD.jl
JuliaIO/JLD.jl
B•Solid
283·JUJulia

Saving and loading julia variables while preserving native types

#data-storage#hdf5-format#jld-format
100%
Merge Rate
-
Review Time
0%
1st-Timers
1 GFI
Scorecard
trixi-framework
Trixi.jl
trixi-framework/Trixi.jl
B•Solid
726·JUJulia

Trixi.jl: Adaptive high-order numerical simulations of conservation laws in Julia

#adaptive-mesh-refinement#amr#conservation-laws
73%
Merge Rate
4d
Review Time
56%
1st-Timers
1 GFI
Scorecard
JuliaDocs
Documenter.jl
JuliaDocs/Documenter.jl
B•Solid
913·JUJulia

A documentation generator for Julia.

#documentation-generator#documentation-tool#julia
42%
Merge Rate
7h
Review Time
40%
1st-Timers
1 GFI
Scorecard
JuliaPlots
UnicodePlots.jl
JuliaPlots/UnicodePlots.jl
B•Solid
1.5k·JUJulia

Unicode-based scientific plotting for working in the terminal

#julia#plots#plotting
100%
Merge Rate
11d
Review Time
100%
1st-Timers
1 GFI
Scorecard
JuliaDynamics
DynamicalSystems.jl
JuliaDynamics/DynamicalSystems.jl
B•Solid
946·JUJulia

Award winning software library for nonlinear dynamics and nonlinear timeseries analysis

#attractor#chaos#delay-coordinates
100%
Merge Rate
-
Review Time
0%
1st-Timers
1 GFI
Scorecard

How to make your first Julia open-source pull request

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