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90 stars written in C
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Open-source KVM software

C 30,405 1,606 Updated Jun 22, 2024

UNIX-like reverse engineering framework and command-line toolset

C 23,354 3,182 Updated Apr 2, 2026

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

C 21,593 8,773 Updated Apr 1, 2026

Open-source keyboard firmware for Atmel AVR and Arm USB families

C 20,246 43,733 Updated Apr 1, 2026

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

C 17,705 8,181 Updated Apr 1, 2026

Legacy mirror of Darwin Kernel. Replaced by https://github.com/apple-oss-distributions/xnu

C 11,228 1,682 Updated Jan 13, 2023

Unicorn CPU emulator framework (ARM, AArch64, M68K, Mips, Sparc, PowerPC, RiscV, S390x, TriCore, X86)

C 8,869 1,482 Updated Feb 19, 2026

🚀 A fast WebAssembly interpreter and the most universal WASM runtime

C 7,886 515 Updated Sep 10, 2024

An open source cross-platform USB stack for embedded system

C 6,650 1,387 Updated Apr 2, 2026

An open source, portable, easy to use, readable and flexible TLS library, and reference implementation of the PSA Cryptography API. Releases are on a varying cadence, typically around 3 - 6 months …

C 6,561 2,856 Updated Apr 1, 2026

WebAssembly Micro Runtime (WAMR)

C 5,870 777 Updated Apr 2, 2026

RIOT - The friendly OS for IoT

C 5,705 2,077 Updated Apr 2, 2026

Protocol Buffers with small code size

C 5,284 999 Updated Mar 27, 2026

Simple unit testing for C

C 5,133 1,099 Updated Mar 27, 2026

Open source STM32 MCU programming toolset

C 5,021 1,310 Updated Oct 12, 2025

An implementation of the TLS/SSL protocols

C 4,697 769 Updated Apr 2, 2026

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

C 3,795 2,577 Updated Apr 6, 2024

Apache NuttX is a mature, real-time embedded operating system (RTOS)

C 3,760 1,530 Updated Apr 1, 2026

Open source smart card tools and middleware. PKCS#11/MiniDriver

C 3,005 820 Updated Apr 1, 2026

A serial device I/O tool

C 2,875 194 Updated Jan 22, 2026

Mongoose OS - an IoT Firmware Development Framework. Supported microcontrollers: ESP32, ESP8266, CC3220, CC3200, STM32F4, STM32L4, STM32F7. Amazon AWS IoT, Microsoft Azure, Google IoT Core integrat…

C 2,635 435 Updated Mar 16, 2026

Concurrency primitives, safe memory reclamation mechanisms and non-blocking (including lock-free) data structures designed to aid in the research, design and implementation of high performance conc…

C 2,620 330 Updated Mar 30, 2026

uhubctl - USB hub per-port power control

C 2,585 253 Updated Jan 16, 2026

A Simple library for communicating with USB and Bluetooth HID devices on Linux, Mac, and Windows.

C 2,536 908 Updated Oct 16, 2023

Windows Driver Installer library for USB devices

C 2,204 508 Updated Jul 17, 2025

Advanced fault backtrace library for ARM Cortex-M series MCU | ARM Cortex-M 系列 MCU 错误追踪库

C 2,039 712 Updated Feb 27, 2025

CommonMark parsing and rendering library and program in C

C 1,944 643 Updated Mar 1, 2026

Secure boot for 32-bit Microcontrollers!

C 1,849 902 Updated Mar 27, 2026

The Computer History Simulation Project

C 1,845 315 Updated Apr 1, 2026
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