Flipper Zero firmware source code
Flipper Zero Unleashed Firmware
A GUI based Nintendo Switch Bootloader
Device OS (Firmware) for particle devices
A system daemon to allow session software to update firmware
Atmosphère is a work-in-progress customized firmware for the Nintendo
ESPHome is a system to control your ESP8266/ESP32
The firmware security analyzer
Complete BIOS & firmware packs for RetroArch, Batocera, Recalbox, etc.
FW for ESP8266/ESP8285/ESP32 used with 3D printer
Keyboard firmware for Atmel AVR and ARM controllers
Alternative firmware for ESP8266 with easy configuration
Circuit diagrams and firmware source code for Gboard DIY keyboards
Open Source Flight Controller Firmware
Complete BIOS and firmware packs for RetroArch, Batocera, Recalbox
openFyde supported hardware "x86 PC with Intel HD graphics
A Toolbox companion for QMK Firmware
Custom firmware for the Ulanzi Smart Pixel clock or self made awtrix
DS emulator, sorta