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Beginner Friendly Open-Source C

Good First Issues in C

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

Updated: Mon, 31 Aug 2026 UTC (Live GitHub Sync)
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Top C Repositories with Beginner Issues (20)

Updated Daily via GitHub GraphQL
puritysb
AgentDeck
puritysb/AgentDeck
SElite
201·C

Physical controller & multi-surface dashboard for AI coding agents — Stream Deck+, Android, iOS/macOS, ESP32 displays, TUI

#ai-agents#android#claude-code
97%
Merge Rate
11h
Review Time
67%
1st-Timers
2 GFI
Scorecard
adafruit
Adafruit_Learning_System_Guides
adafruit/Adafruit_Learning_System_Guides
SElite
1.1k·C

Programs and scripts to display "inline" in Adafruit Learning System guides

#arduino-library
100%
Merge Rate
<1h
Review Time
100%
1st-Timers
1 GFI
Scorecard
pwmt
zathura
pwmt/zathura
AWelcoming
3.3k·C

Document viewer

#document#viewer
79%
Merge Rate
20h
Review Time
100%
1st-Timers
1 GFI
Scorecard
Xilinx
mlir-aie
Xilinx/mlir-aie
AWelcoming
679·C

A close-to-metal Python API for programming AMD Ryzen™ AI NPUs (AI Engines), built on an open-source MLIR-based compiler toolchain.

25%
Merge Rate
3h
Review Time
33%
1st-Timers
28 GFI
Scorecard
ravachol
kew
ravachol/kew
BSolid
3.0k·C

Music for the Shell. kew is an immersive and fast music player that allows you to listen to music with privacy.

#audio-player#command-line#kew
82%
Merge Rate
3h
Review Time
100%
1st-Timers
1 GFI
Scorecard
LostArtefacts
TRX
LostArtefacts/TRX
AWelcoming
967·C

Open source re-implementation of Tomb Raider I, Tomb Raider II and Tomb Raider III, along with additional enhancements and bugfixes

21%
Merge Rate
11h
Review Time
0%
1st-Timers
3 GFI
Scorecard
netblue30
firejail
netblue30/firejail
BSolid
7.6k·C

Linux namespaces and seccomp-bpf sandbox

60%
Merge Rate
3d
Review Time
60%
1st-Timers
2 GFI
Scorecard
rusefi
rusefi
rusefi/rusefi
BSolid
1.1k·C

rusefi - GPL internal combustion engine control unit

50%
Merge Rate
19h
Review Time
0%
1st-Timers
5 GFI
Scorecard
HarbourMasters
2ship2harkinian
HarbourMasters/2ship2harkinian
BSolid
2.2k·C

No repository description available.

50%
Merge Rate
1d
Review Time
100%
1st-Timers
1 GFI
Scorecard
Brainrotlang
brainrot
Brainrotlang/brainrot
BSolid
625·C

Brainrot programming language interpreter

25%
Merge Rate
20h
Review Time
0%
1st-Timers
38 GFI
Scorecard
fastfetch-cli
fastfetch
fastfetch-cli/fastfetch
BSolid
24.2k·C

A maintained, feature-rich and performance oriented, neofetch like system information tool.

#bsdfetch#command-line#fastfetch
100%
Merge Rate
<1h
Review Time
0%
1st-Timers
1 GFI
Scorecard
ubuntu
lightdm
ubuntu/lightdm
BSolid
989·C

Display Manager

100%
Merge Rate
14h
Review Time
0%
1st-Timers
1 GFI
Scorecard
gojue
ecapture
gojue/ecapture
BSolid
15.4k·C

Capturing SSL/TLS plaintext without a CA certificate using eBPF. Supported on Linux/Android kernels for amd64/arm64.

#android-https-capture#ebpf#golang
64%
Merge Rate
7h
Review Time
60%
1st-Timers
1 GFI
Scorecard
RsyncProject
rsync
RsyncProject/rsync
BSolid
5.1k·C

An open source utility that provides fast incremental file transfer. It also has useful features for backup and restore operations among many other use cases.

55%
Merge Rate
20h
Review Time
50%
1st-Timers
1 GFI
Scorecard
frednora
gramado
frednora/gramado
BSolid
653·C

Gramado OS

#gui#kernel#kernel-developers
100%
Merge Rate
-
Review Time
0%
1st-Timers
1 GFI
Scorecard
JustVugg
colibri
JustVugg/colibri
BSolid
26.4k·C

Run frontier MoE models on hardware you already own — pure C, zero deps, experts streamed from disk. Tiny engine, immense model. 🐦

12%
Merge Rate
2h
Review Time
0%
1st-Timers
3 GFI
Scorecard
tree-sitter
py-tree-sitter
tree-sitter/py-tree-sitter
BSolid
1.5k·C

Python bindings to the Tree-sitter parsing library

#binding#python#tree-sitter
78%
Merge Rate
6d
Review Time
100%
1st-Timers
2 GFI
Scorecard
obsproject
obs-studio
obsproject/obs-studio
DRisky
75.6k·C

OBS Studio - Free and open source software for live streaming and screen recording

-
Merge Rate
14h
Review Time
0%
1st-Timers
2 GFI
Scorecard
taosdata
TDengine
taosdata/TDengine
DRisky
25.1k·C

High-performance, scalable time-series database designed for Industrial IoT (IIoT) scenarios

-
Merge Rate
-
Review Time
0%
1st-Timers
11 GFI
Scorecard
SpacehuhnTech
esp8266_deauther
SpacehuhnTech/esp8266_deauther
DRisky
14.9k·C

Affordable WiFi hacking platform for testing and learning

#arduino#attack#board
-
Merge Rate
<1h
Review Time
0%
1st-Timers
2 GFI
Scorecard

How to make your first C open-source pull request

Finding approachable Good First Issues in C allows you to build real-world software engineering experience. Instead of submitting PRs to abandoned repositories, GetMerged verifies maintainer review speeds and first-timer acceptance rates before you write a single line of code.

Select any issue above to claim it directly on GitHub, or click a repository to inspect full maintainer review turnaround metrics and triage guidance!

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