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The performance-minded LED library for Arduino-compatible MCUs including ESP32, Teensy and RP2040.

Official Espressif IoT Development Framework for ESP32, ESP32-S and ESP32-C series SoCs.

Control WS2812B and many more types of digital RGB LEDs with an ESP8266 or ESP32 over WiFi!

Async Web Server for ESP8266 and ESP32 — WebSocket, EventSource and URL rewrites. Actively maintained fork.

Alternative firmware for ESP8266/ESP32 with web UI, OTA updates, and MQTT — a Home Automation staple.

Optimized firmware for RepRap 3D printers based on the Arduino platform — STM32 & AVR targets.

SDK for developing for the Raspberry Pi Pico and other RP2040-based boards.

ESPHome is a system to control your ESP8266/ESP32 by simple yet powerful YAML configuration files.

MicroPython — a lean and efficient Python implementation for microcontrollers including RP2040, ESP32, STM32.

Predatory ESP32 firmware — multi-tool for WiFi, BLE, IR, RF, NFC on cardputer, m5stick and similar devices.