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241 stars written in C
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Linux kernel source tree

C 228,187 61,545 Updated Apr 12, 2026

TLS/SSL and crypto library

C 29,909 11,185 Updated Apr 11, 2026

Embedded graphics library to create beautiful UIs for any MCU, MPU and display type.

C 23,244 4,109 Updated Apr 9, 2026

Collection of various algorithms in mathematics, machine learning, computer science, physics, etc implemented in C for educational purposes.

C 21,877 4,733 Updated Aug 7, 2024

MicroPython - a lean and efficient Python implementation for microcontrollers and constrained systems

C 21,610 8,792 Updated Apr 10, 2026

Espressif IoT Development Framework. Official development framework for Espressif SoCs.

C 17,800 8,207 Updated Apr 10, 2026

Primary Git Repository for the Zephyr Project. Zephyr is a new generation, scalable, optimized, secure RTOS for multiple hardware architectures.

C 14,949 8,960 Updated Apr 11, 2026

RT-Thread is an open source IoT Real-Time Operating System (RTOS). https://rt-thread.github.io/rt-thread/

C 11,888 5,378 Updated Apr 12, 2026

Extremely Fast Compression algorithm

C 11,759 1,534 Updated Apr 1, 2026

A small C compiler

C 11,519 1,046 Updated Oct 30, 2023

Capstone disassembly/disassembler framework for ARM, ARM64 (ARMv8), Alpha, BPF, Ethereum VM, HPPA, LoongArch, M68K, M680X, Mips, MOS65XX, PPC, RISC-V(rv32G/rv64G), SH, Sparc, SystemZ, TMS320C64X, T…

C 8,656 1,670 Updated Apr 10, 2026

'Classic' FreeRTOS distribution. Started as Git clone of FreeRTOS SourceForge SVN repo. Submodules the kernel.

C 7,184 1,988 Updated Mar 16, 2026

An open source cross-platform USB stack for embedded system

C 6,702 1,394 Updated Apr 10, 2026

A cross-platform library to access USB devices

C 6,020 2,036 Updated Apr 10, 2026

Iceman Fork - Proxmark3

C 5,434 1,301 Updated Apr 11, 2026

Open source STM32 MCU programming toolset

C 5,027 1,312 Updated Oct 12, 2025

Small portable AES128/192/256 in C

C 4,912 1,392 Updated Oct 4, 2024

An ultra-lightweight(ROM<1.6K, RAM<0.3k), high-performance C/C++ log library. | 一款超轻量级(ROM<1.6K, RAM<0.3k)、高性能的 C/C++ 日志库

C 4,548 1,286 Updated Dec 26, 2024

FreeRTOS kernel files only, submoduled into https://github.com/FreeRTOS/FreeRTOS and various other repos.

C 4,007 1,496 Updated Apr 3, 2026

The official git repository for Contiki, the open source OS for the Internet of Things

C 3,793 2,578 Updated Apr 6, 2024

Open source ARM Cortex-M microcontroller library

C 3,556 1,115 Updated Mar 21, 2026

Proxmark 3

C 3,466 945 Updated Jan 2, 2026

Software-Defined GPS Signal Simulator

C 3,358 947 Updated Jan 26, 2025

STM32 core support for Arduino

C 3,244 1,076 Updated Apr 7, 2026

Spike, a RISC-V ISA Simulator

C 3,064 1,050 Updated Apr 6, 2026

The VESC motor control firmware

C 3,046 1,759 Updated Apr 9, 2026

Arduino STM32. Hardware files to support STM32 boards, on Arduino IDE 1.8.x including LeafLabs Maple and other generic STM32F103 boards

C 2,653 1,273 Updated Jul 1, 2025

An ultra-lightweight database that supports key-value and time series data | 一款支持 KV 数据和时序数据的超轻量级数据库

C 2,512 530 Updated Mar 23, 2026

Windows Driver Installer library for USB devices

C 2,214 510 Updated Jul 17, 2025
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