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25 stars written in C
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Writing an OS in 1,000 lines.

C 3,152 249 Updated Nov 26, 2025

Patch for Windows 9x to fix CPU issues

C 1,055 52 Updated Nov 9, 2025

gs_usb compatible firmware for candleLight, cantact and canable

C 836 354 Updated Dec 18, 2025

Software CAN bus implementation for rp2040 micro-controllers

C 803 85 Updated Jun 3, 2025

a gcc-based cross-compiler for classic 68K and PPC Macintoshes

C 647 63 Updated Nov 20, 2025

stm32 ethernet over usb (rndis + lwip)

C 363 138 Updated Jun 24, 2021

Radically unbloated DEFLATE/zlib/gzip compression/decompression library. Can decompress any gzip/zlib data, and offers simplified compressor which produces gzip-compatible output, while requiring m…

C 337 92 Updated Oct 9, 2023

The collaborative Open Source successor to qmail and netqmail

C 320 30 Updated Nov 24, 2025

The bootloader used to flash our CAN-connected boards

C 149 52 Updated Feb 6, 2023

Open Programming Firmware for the TL866A Programmer.

C 135 22 Updated Dec 19, 2022

Very small, safe, lightning fast, yet portable preemptive RTOS with SMP support

C 118 10 Updated Dec 18, 2025
C 116 49 Updated Dec 12, 2025

Benchmark CPU Performance on Arduino Compatible Boards

C 116 19 Updated Dec 10, 2021

STM32 with QCA7005 as CCS charge controller

C 96 48 Updated Sep 2, 2025

SPIN Core Software

C 78 10 Updated Feb 16, 2022

FreeRTOS port for TI C2000's C28x based microcontrollers

C 72 33 Updated Jun 26, 2020

"Lock-Free Ring Buffer" (LFRB) is a minimal, customizable implementation of a ring buffer (a.k.a. circular buffer) in C, specifically suitable for embedded systems.

C 62 13 Updated Oct 7, 2024

Dissector for the V2G Protocols

C 60 21 Updated Nov 5, 2025

TRS-80 Model 1/3/4/4P emulator for Unix-like host machines

C 49 18 Updated Aug 19, 2025

Advanced arduino based firmware for TEF6686 with ESP32

C 41 11 Updated Sep 16, 2025

Repository for C2000Ware

C 31 16 Updated Oct 27, 2025

FreHD v1

C 27 11 Updated Sep 23, 2024

Wireshark Plugin for viewing ISO15118 VSE elements in Beacon, Probe requests, and (re)association messages

C 22 14 Updated Nov 4, 2019

TRS-80 Star Trek 2014 !!

C 17 3 Updated Nov 20, 2025

Gilded Rose Kata in C using Symbolic Execution with Klee

C 1 Updated Jun 15, 2024