OpenBuilds BLOX can be used with any existing ESP32-S3 supported firmware development toolchains and distributions

Below just an handful of the popular ones:

ESP-IDF (Espressif IoT Development Framework)

1. The official development framework for ESP32 and ESP32-S3.
2. ESP-IDF GitHub
3. Documentation

PlatformIO

1. A cross-platform IDE with support for ESP32-S3.
2. PlatformIO ESP32
3. Documentation

Eclipse IDE with ESP-IDF

1. A popular integrated development environment for ESP32.
2. Eclipse IDE for C/C++ Developers

Zephyr RTOS

1. An open-source real-time operating system that supports ESP32.
2. Zephyr RTOS Website
3. ESP32 Support

Mbed OS

1. An open-source operating system for IoT devices that supports ESP32-S3.
2. Mbed OS Website
3. ESP32-S3 Support

Tasmota

1. A highly configurable firmware for IoT devices.
2. Tasmota Website
3. GitHub Repository

CircuitPython

1. A beginner-friendly version of Python for microcontrollers.
2. CircuitPython Website
3. ESP32-S3 Support

Lua (NodeMCU)

1. Firmware that enables Lua scripting on ESP32-S3.
2. NodeMCU GitHub
3. Documentation

MicroPython

1. A lean implementation of Python 3, designed for microcontrollers.
2. MicroPython Website
3. ESP32 Documentation

Mongoose OS

1. An operating system for IoT devices that supports ESP32-S3.
2. Mongoose OS Website
3. GitHub Repository

OpenThread

1. An open-source implementation of the Thread networking protocol.
2. OpenThread Website
3. ESP32 Support

RT-Thread OS

1. An open-source real-time operating system with ESP32 support.
2. RT-Thread OS Website
3. ESP32 Support

ThingSpeak

1. An IoT analytics platform service.
2. ThingSpeak Website
3. ESP32 Integration

Blynk

1. An IoT platform for developing applications with mobile app integration.
2. Blynk Website
3. ESP32 Integration

Ecosystem Firmware (Ecosystem)

1. Ecosystem firmware designed for various IoT applications, including support for ESP32.
2. Ecosystem Firmware Website
3. ESP32 Integration

Espruino

1. JavaScript interpreter for microcontrollers, including ESP32.
2. Espruino Website
3. ESP32 Support

TUNIOT

1. A development platform that provides tools for programming ESP32-S3.
2. TUNIOT Website
3. ESP32-S3 Support

NuttX

1. A real-time operating system with a POSIX-compliant API, supporting ESP32.
2. NuttX OS Website
3. ESP32 Support

DigiX

1. Firmware and tools for creating wireless sensor networks using ESP32.
2. DigiX GitHub

Contiki OS

1. An open-source operating system for IoT devices, including ESP32.
2. Contiki OS Website
3. ESP32 Support

Edison (Edison OS)

1. A specialized firmware for IoT and edge computing, including support for ESP32.
2. Edison OS Website