Marlin is an optimized firmware for RepRap 3D printers based on the Arduino platform. | Many commercial 3D printers come with Marlin installed. Check with your vendor if you need source code for your specific machine.

Lua based interactive firmware for ESP8266, ESP8285 and ESP32

Arduino core for the ESP32

PlatformIO is a professional collaborative platform for embedded development 👽 A place where Developers and Teams have true Freedom! No more vendor lock-in!

Blynk library for embedded hardware. Works with Arduino, ESP8266, Raspberry Pi, Intel Edison/Galileo, LinkIt ONE, Particle Core/Photon, Energia, ARM mbed, etc.

🚀 The fastest WebAssembly interpreter (and the most universal wasm runtime)

Mongoose OS - an IoT Firmware Development Framework. Supported microcontrollers: ESP32, ESP8266, CC3220, CC3200, STM32F4, STM32L4, STM32F7. Amazon AWS IoT, Microsoft Azure, Google IoT Core integrated. Code in C or JavaScript.

ESPHome is a system to control your ESP8266/ESP32 by simple yet powerful configuration files and control them remotely through Home Automation systems.

Blynk is an Internet of Things Platform aimed to simplify building mobile and web applications for the Internet of Things. Easily connect 400+ hardware models like Arduino, ESP8266, ESP32, Raspberry Pi and similar MCUs and drag-n-drop IOT mobile apps for iOS and Android in 5 minutes

MQTT gateway for ESP8266, ESP32, Sonoff RF Bridge or Arduino with bidirectional 433mhz/315mhz/868mhz, Infrared communications, BLE, beacons detection, mi flora / mi jia / LYWSD02/ Mi Scale compatibility, SMS & LORA.

Sample ESP32 snippets and code fragments

Embedded JavaScript engine for C/C++

Driver for the SSD1306 and SH1106 based 128x64, 128x32, 64x48 pixel OLED display running on ESP8266/ESP32

MySensors library and examples

A small Arduino library for GSM modules, that just works

The OpenSource Disassembler

Arduino and PlatformIO IDE compatible TFT library optimised for the STM32, ESP8266 and ESP32 that supports different driver chips

Open Home Automation with Home Assistant, ESP8266/ESP32 and MQTT

FW for ESP8266/ESP8285/ESP32 used with 3D printer

Arduino library to play MOD, WAV, FLAC, MIDI, RTTTL, MP3, and AAC files on I2S DACs or with a software emulated delta-sigma DAC on the ESP8266 and ESP32

Wifi & BLE driven passenger flow metering with cheap ESP32 boards

Proof of Concept of ESP32/8266 Wi-Fi vulnerabilties (CVE-2019-12586, CVE-2019-12587, CVE-2019-12588)

Tiny Erlang VM

A port of Grbl CNC Firmware for ESP32

Make your Sonoff Switch compatible with Apple Homekit! 🎉

MicroPython for ESP32 with psRAM support

An IoT Solution,Blinker library for embedded hardware. Works with Arduino, ESP8266, ESP32.

🚨 No longer used 🚨 - The C++ framework behind ESPHome

Lua RTOS for ESP32

📶 An Arduino for ESP8266 asynchronous MQTT client implementation