78 / xiaozhi-esp32

An ESP32 firmware project for a voice chatbot that connects to LLM backends and supports MCP-based device and cloud tool control.

dorianborian / sesame-robot

Open-source mini quadruped robot built on an ESP32, with 3D-printable parts, 8 servos, and an OLED face.

openwrt / openwrt

Linux operating system for embedded routers and devices, providing a writable filesystem with opkg package management.

Atmosphere-NX / Atmosphere

Custom firmware for the Nintendo Switch that replaces and modifies several layers of the console's boot and system software.

arendst / Tasmota

Alternative open-source firmware for ESP8266 and ESP32 devices, configurable via web UI and controllable locally over MQTT, HTTP, Serial or KNX.

linux-surface / linux-surface

Patched Linux kernel and support packages that add drivers for Microsoft Surface hardware not yet upstream.

esphome / esphome

Generates firmware for ESP32, ESP8266, RP2040 and similar microcontrollers from YAML configuration files, integrating with Home Assistant.

EchoStretch / kstuff-lite

Modified kstuff-lite PS4 kernel-exploit toolkit (1.11-opt) that optimizes UELF/KELF transitions, FPU/CR0 handling, and adds opt-in diagnostics.

The-OpenROAD-Project / OpenROAD

Open-source unified application implementing an RTL-to-GDS physical design flow for digital chips, with Tcl and Python APIs.

themactep / thingino-firmware

Open-source firmware for Ingenic SoC IP cameras, built as a Buildroot external tree.

adam-maj / tiny-gpu

A minimal GPU design written in Verilog that shows how GPU cores, dispatch, and memory controllers work together.

ExpressLRS / ExpressLRS

Open source LoRa-based radio control link firmware for FPV drones and RC vehicles, running on ESP and STM32 hardware.

qmk / qmk_firmware

Open-source firmware for custom keyboard controllers, supporting AVR and Arm USB microcontrollers and many keyboard designs.

OpenXiangShan / XiangShan

Open-source high-performance RISC-V processor core written in Chisel, developed by the XiangShan project.

verilator / verilator

Open-source SystemVerilog/Verilog simulator and lint tool that compiles hardware designs into multithreaded C++ or SystemC.

lowRISC / ibex

Ibex is a parametrizable 32-bit RISC-V CPU core written in SystemVerilog for embedded control applications.

hathach / tinyusb

Cross-platform USB host and device stack in C for embedded systems, with no dynamic allocation and interrupts deferred to task context.

Mbed-TLS / mbedtls

A C library implementing X.509 certificate handling and the TLS and DTLS protocols, with a small footprint for embedded systems.

espressif / esp-dl

Lightweight neural network inference framework for running AI models on Espressif ESP series chips.

RibShark / OmniDrive

Firmware modification for MediaTek MT1959-based Hitachi-LG optical drives that enables lead-in/lead-out and raw sector reading of discs.

cirosantilli / x86-bare-metal-examples

Collection of dozens of minimal bare-metal x86 operating system examples for learning low-level system programming, tested in QEMU and on real hardware.

armbian / build

Build framework that compiles custom Armbian Linux OS images for ARM single-board computers from source.

google-coral / coralnpu

Coral NPU is an open-source RISC-V neural processing unit IP core for low-power ML inference on wearables and edge SoCs.

lowRISC / opentitan

Open source silicon root of trust hardware, software, and tooling in a single monorepo, developed by lowRISC and partners.

nix-community / nixos-apple-silicon

NixOS configuration modules and package expressions for running NixOS bare metal on Apple Silicon Macs.

openhwfoundation / cva6

CVA6 is a 6-stage, single-issue, in-order 64-bit RISC-V CPU core written in SystemVerilog, supporting Linux-capable configurations.

ucb-bar / chipyard

Open-source Chisel framework for building agile RISC-V systems-on-chip from cores, accelerators, and peripherals.

vlang / vinix

Vinix is a bare-metal operating system for amd64 and arm64 written in the V programming language, aiming to be modern, fast, and usable.

z88dk / z88dk

Development kit with C compiler, assembler, linker, and libraries for Z80-family and 8080 machines.

TinyTapeout / ttsky-verilog-template

Starter template for building Verilog designs that get fabricated on a Tiny Tapeout SKY130 shuttle chip.

openhwfoundation / cvw

Wally is a configurable 5-stage pipelined RISC-V processor written in SystemVerilog, supporting RVA22 and virtual memory.

bitdump / BLHeli

Open-source assembly firmware for sensorless brushless motor speed controllers (ESCs) on Atmel and Silabs 8-bit MCUs.