Alternative firmware for ESP8266 and ESP32 based devices with easy configuration using webUI, OTA updates, automation using timers or rules, expandability and entirely local control over MQTT, HTTP, Serial or KNX. Full documentation at

Flipper Zero Unleashed Firmware

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.

Flipper Zero firmware source code

How to be low-level programmer

Your Gateway to Embedded Software Development Excellence 👽

Lua based interactive firmware for ESP8266, ESP8285 and ESP32

Open Source Soldering Iron firmware

Enhanced version of Asus's router firmware (Asuswrt) (legacy code base)

A suite of WiFi/Bluetooth offensive and defensive tools for the ESP32

Third party firmware for Asus routers (newer codebase)

🐬 Feature-rich, stable and customizable Flipper Firmware

EDK II

A comprehensive roadmap for aspiring Embedded Systems Engineers, featuring a curated list of learning resources.

Armbian Linux build framework generates custom Debian or Ubuntu image for x86, aarch64, riscv64 & armhf

Unofficial Galaxy Buds Manager for Windows, macOS, Linux, and Android

OpenSK is an open-source implementation for security keys written in Rust that supports both FIDO U2F and FIDO2 standards.

Home automation firmware for ESP8266-based devices

Platform Security Assessment Framework

A system daemon to allow session software to update firmware