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

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

Lua based interactive firmware for ESP8266, ESP8285 and ESP32

An open source cross-platform USB stack for embedded system

ESP32/ESP8285-based High-Performance Radio Link for RC applications

Arduino and PlatformIO IDE compatible TFT library optimised for the Raspberry Pi Pico (RP2040), STM32, ESP8266 and ESP32 that supports different driver chips

Latest ESP8266 SDK based on FreeRTOS, esp-idf style.

The Espruino JavaScript interpreter - Official Repo

pongoOS

Raspberry Pi Pico Arduino core, for all RP2040 and RP2350 boards

Sample ESP32 snippets and code fragments

Improved version of first ESP32 NerdMiner

Espressif IoT Library. IoT Device Drivers, Documentations and Solutions.

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

Core recovery files for the Team Win Recovery Project (T.W.R.P) - this is not up to date, please see https://github.com/TeamWin/android_bootable_recovery/

USB host/device implementation using PIO of raspberry pi pico (RP2040/RP2350).

Component library for ESP32-xx and ESP8266

ESP8266 Analog Broadcast Television Interface

Software-only ESP8266 USB Device

Expanded version of the Espressif ESP webcam

Mini Drone/Quadcopter Firmware for ESP32 and ESP32-S Series SoCs.

Lua RTOS for ESP32

LVGL ported to ESP32 including various display and touchpad drivers

MQTT client library for ESP8266

AT application for ESP32/ESP32-C2/ESP32-C3/ESP32-C6/ESP8266

WiFi Hash Purple Monster, store EAPOL & PMKID packets in an SD CARD using a M5STACK / ESP32 device

The ESP8266 based multi-client lighting gadget

ESP8266 nonOS SDK