Welcoming Repositories Index Nim Ecosystem

Top Welcoming Open-Source Nim Repositories

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

Updated daily • Mon, 31 Aug 2026 UTC
Tracked Repos
102
>100 stars verified
Avg Merge Rate
24%
90-day external PRs
Open GFIs
1
Beginner friendly issues
Welcoming Tier
9
S & A Tier maintainers

Ranked Nim Repositories

Showing top 50 of 102 ranked repositories

RankRepositoryTierScoreMerge RateGood First Issues
#1
libp2p implementation in Nim
S•Elite76.890.6% -
#2
CodeTracer is a user-friendly time-traveling debugger designed to support a wide range of programming languages.
S•Elite74.193.0% -
#3
A command line based editor inspired by Vim. Written in Nim.
A•Welcoming69.398.2% -
#4
Nim implementation of the Ethereum Beacon Chain
A•Welcoming66.871.9% -
#5
Nim library for implementing JSON-RPC clients and servers
A•Welcoming65.5100.0% -
#6
LLVM-based compiler for the Nim language
B•Solid64.0100.0% -
#7
Lightweight, energy-efficient, easily auditable threadpool
A•Welcoming62.4100.0% -
#8
List of packages for Nimble
A•Welcoming60.280.7% -
#9
Chronos - An efficient library for asynchronous programming
A•Welcoming58.140.0% -
#10
Nim is a statically typed compiled systems programming language. It combines successful concepts from mature languages like Python, Ada and Modula. Its design focuses on efficiency, expressiveness, and elegance (in that order of priority).
A•Welcoming55.664.5% -
#11
Nimony is a new Nim implementation that is in heavy development.
B•Solid53.022.2% -
#12
Logos Messaging protocols implemented in Nim
B•Solid51.250.0% -
#13
The Nim language server implementation (based on nimsuggest)
B•Solid49.2100.0% -
#14
Nimbus: an Ethereum Execution Client for Resource-Restricted Devices
B•Solid47.012.5% -
#15
:rocket: seqfu - Sequece Fastx Utilities
B•Solid43.6100.0% -
#16
Pure Nim implementation of deflate, zlib, gzip and zip.
C•Moderate29.6100.0% -
#17
Alternative Twitter front-end
D•Risky10.50.0%1
#18
Mirror of a roguelike in sky with a steampunk setting
D•Risky8.00.0% -
#19
Effort free video editing!
D•Risky0.00.0% -
#20
Package manager for the Nim programming language.
D•Risky0.00.0% -
#21
Powerful and flexible web framework written in Nim
D•Risky0.00.0% -
#22
nitch - incredibly fast system fetch written in nim
D•Risky0.00.0% -
#23
Constantine: modular, high-performance, zero-dependency cryptography stack for verifiable computation, proof systems and blockchain protocols.
D•Risky0.00.0% -
#24
A hobby OS implemented in Nim https://0xc0ffee.netlify.app/osdev
D•Risky0.00.0% -
#25
Nim-based assembly packer and shellcode loader for opsec & profit
D•Risky0.00.0% -
#26
A Logo-like 3D environment, implemented in Nim
D•Risky0.00.0% -
#27
A highly performant, multi-threaded HTTP 1.1 server written in Nim.
D•Risky0.00.0% -
#28
PyTorch - Python + Nim
D•Risky0.00.0% -
#29
A curses inspired simple cross-platform console library for Nim
D•Risky0.00.0% -
#30
A declarative user interface framework based on GTK 4
D•Risky0.00.0% -
#31
Python Game Hacking Library
D•Risky0.00.0% -
#32
Language Server Protocol implementation for Nim
D•Risky0.00.0% -
#33
Nimbo-C2 is yet another (simple and lightweight) C2 framework
D•Risky0.00.0% -
#34
parrot anonymous mode
D•Risky0.00.0% -
#35
Chalk allows you to follow code from development, through builds and into production.
D•Risky0.00.0% -
#36
Tool for taking notes and open urls with taskwarrior (mirror of https://codeberg.org/jschlatow/taskopen)
D•Risky0.00.0% -
#37
Conquest is a feature-rich and malleable command & control/post-exploitation framework developed in Nim.
D•Risky0.00.0% -
#38
A Nim ORM for SQLite and Postgres
D•Risky0.00.0% -
#39
🚀 Fast Port Scanner 🚀
D•Risky0.00.0% -
#40
NimGL is a Nim library that offers bindings for popular libraries used in computer graphics
D•Risky0.00.0% -
#41
Kill AV/EDR leveraging BYOVD attack
D•Risky0.00.0% -
#42
A modern BBS
D•Risky0.00.0% -
#43
System monitoring tool with historical data service, triggers and top-like TUI
D•Risky0.00.0% -
#44
A Smalltalk and Rebol inspired language implemented as an AST interpreter in Nim
D•Risky0.00.0% -
#45
IDE/Advanced text editor mainly focusing on support for the Nim programming language.
D•Risky0.00.0% -
#46
Nimterop is a Nim package that aims to make C/C++ interop seamless
D•Risky0.00.0% -
#47
An experimental programming language for data flow
D•Risky0.00.0% -
#48
Nim's Windows GUI Framework
D•Risky0.00.0% -
#49
An in development statically typed systems programming language; with sustainability at its core. We, the community of users, maintain it.
D•Risky0.00.0% -
#50
DataFrame API written in Nim, enabling fast out-of-core data processing
D•Risky0.00.0% -

How to Get Your Nim 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 Nim Frameworks & Stacks

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Frequently Asked Questions: Nim Open Source

What is the most welcoming Nim open-source repository?

The highest-ranked Nim repository on GetMerged is currently vacp2p/nim-libp2p, with a C-Rank score of 76.8/100 and a 90.6% PR merge rate.

How can I find good first issues in Nim?

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

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

A ‘Super Welcoming’ (S-Tier) Nim 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.