Welcoming Repositories Index Scheme Ecosystem

Top Welcoming Open-Source Scheme Repositories

Top welcoming Scheme repositories. Scored by real 90-day external PR merge rates, maintainer review turnaround speed, and first-time contributor success.

Updated daily • Sun, 30 Aug 2026 UTC
Tracked Repos
15
>100 stars verified
Avg Merge Rate
25%
90-day external PRs
Open GFIs
1
Beginner friendly issues
Welcoming Tier
4
S & A Tier maintainers

Ranked Scheme Repositories

Showing top 15 of 15 ranked repositories

RankRepositoryTierScoreMerge RateGood First Issues
#1
A Clojure compiler implemented on top of Chez Scheme
S•Elite82.296.7%1
#2
Mogan STEM Suite (based on GNU TeXmacs): Enjoy exploring science and technology!
S•Elite75.086.4% -
#3
Official chibi-scheme repository
A•Welcoming69.084.6% -
#4
Chez Scheme
A•Welcoming58.5100.0% -
#5
Gambit is an efficient implementation of the Scheme programming language.
D•Risky0.00.0% -
#6
Prototype smart text editor
D•Risky0.00.0% -
#7
Scheme Scripting Engine
D•Risky0.00.0% -
#8
Interpreter framework for Lisp-based extension and scripting languages on macOS and iOS. LispKit is based on the R7RS standard for Scheme. Its compiler generates bytecode for a virtual machine. LispKit is fully implemented in Swift 5.
D•Risky0.00.0% -
#9
An opinionated Kubernetes distribution with a focus on long-term on-prem deployments
D•Risky0.00.0% -
#10
A Unix shell and Lisp REPL, fused together
D•Risky0.00.0% -
#11
Otus Lisp (Ol) is a purely functional multi-platform Scheme dialect with built-in FFI and infix math.
D•Risky0.00.0% -
#12
Mirror only, please visit https://gitlab.com/NalaGinrut/artanis
D•Risky0.00.0% -
#13
Neuro-symbolic interpretation learning (mostly just language-learning, for now)
D•Risky0.00.0% -
#14
A distributed, fault-tolerant, high-concurrency backend framework with continuation-based web programming and a remote retry ring, built on Chez Scheme.
D•Risky0.00.0% -
#15
SRFIs for Chez Scheme
D•Risky0.00.0% -

How to Get Your Scheme PR Merged

1
Check C-Rankâ„¢ First: Pick projects with S or A tiers to avoid maintainer ghosts and slow review cycles.
2
Run Local Verification: Ensure test suites and formatting linters pass before opening a pull request.
3
Submit in Maintainer Windows: Check the repository report card to submit when maintainers are most active.

Top Scheme Frameworks & Stacks

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Frequently Asked Questions: Scheme Open Source

What is the most welcoming Scheme open-source repository?

The highest-ranked Scheme repository on GetMerged is currently jolt-lang/jolt, with a C-Rank score of 82.2/100 and a 96.7% PR merge rate.

How can I find good first issues in Scheme?

You can browse verified beginner-friendly issues in Scheme by visiting our curated Good First Issues directory at getmerged.abhishekco.de/good-first-issue/scheme.

What makes a Scheme repository ‘Super Welcoming’ on GetMerged?

A ‘Super Welcoming’ (S-Tier) Scheme repository demonstrates an external PR merge rate above 80%, a median first response time within 24 to 48 hours, active review feedback, and clear onboarding documentation.