LibhydrogenA lightweight, secure, easy-to-use crypto library suitable for constrained environments.
Piconomix Fwlibopen source bare-metal C firmware and documentation for microcontrollers
HeliosThe free embedded operating system.
Llvm[MERGED UPSTREAM] AVR backend for the LLVM compiler library
Avr Halembedded-hal abstractions for AVR microcontrollers
MegacoreArduino hardware package for ATmega64, ATmega128, ATmega640, ATmega1280, ATmega1281, ATmega2560, ATmega2561, AT90CAN32, AT90CAN64 and AT90CAN128
Logic AnalyzerLogic Analyzer, for Arduino, AVR, ESP8266 and STM32 with a very nice working processing interface, you could run it also on any Android device.
BlogA set of various projects based on ESP8266, ESP32, ATtiny13, ATtiny85, ATtiny2313, ATmega8, ATmega328, ATmega32, STM32 and more.
Arduino boardsBoard definitions for SparkFun-manufactured AVR, ARM, and ESP-based Arduino boards.
XpccDEPRECATED, use our successor library https://modm.io instead
NosRTOS for microcontrollers
TinypcA miniature gaming PC / laptop
MarlinMarlin 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.
Snopfsnopf USB password token
QpnQP-nano real-time embedded framework/RTOS for embedded systems based on active objects (actors) and hierarchical state machines
Avr VmVM with JIT-compiler for ATMega32 written in Rust
Avr8jsArduino (8-bit AVR) simulator, written in JavaScript and runs in the browser / Node.js
Erika3ERIKA Enterprise v3 RTOS
MicronucleusATTiny usb bootloader with a strong emphasis on bootloader compactness.
AvraAssembler for the Atmel AVR microcontroller family
Avr Uart Libextremly light uart library for AVR 8 bit microcontrollers
Rhme 2017Riscure Hack Me embedded hardware CTF 2017-2018.
DeepsleepschedulerDeepSleepScheduler is a lightweight, cooperative task scheduler library with configurable sleep and task supervision.
TinygoGo compiler for small places. Microcontrollers, WebAssembly (WASM/WASI), and command-line tools. Based on LLVM.
AttinycoreArduino core for ATtiny 1634, 828, x313, x4, x41, x5, x61, x7 and x8
Rumba PlusA premium-quality 3D printer control board by Aus3D.
CaluniumArduino clone based on the ATmega644P/ATmega1284P
AvrdEmbedded Systems in D - Port of avr-libc headers and most avr-gcc processor defines
MinicoreArduino hardware package for ATmega8, ATmega48, ATmega88, ATmega168, ATmega328 and ATmega328PB
Platformio CorePlatformIO is a professional collaborative platform for embedded development 👽 A place where Developers and Teams have true Freedom! No more vendor lock-in!
EasyavrEasy AVR USB Keyboard Firmware and Keymapper
MightycoreArduino hardware package for ATmega1284, ATmega644, ATmega324, ATmega324PB, ATmega164, ATmega32, ATmega16 and ATmega8535
Modmmodm: a C++20 library generator for AVR and ARM Cortex-M devices
MicrocoreAn optimized Arduino hardware package for ATtiny13
LbforthSelf-hosting metacompiled Forth, bootstrapping from a few lines of C; targets Linux, Windows, ARM, RISC-V, 68000, PDP-11, asm.js.
PlantwateringalarmA soil humidity level sensor based on ATTINY44. Uses capacitive sensing.
duino-coinᕲ Duino-Coin is a coin that can be mined with almost everything, including Arduino boards.
TwoKeyA password manager with physical 2FA.
Si446xSi4463 Radio Library for AVR and Arduino
Arduino Deep SleepAn example of proper and most advanced way to put ANY AVR Arduino boards in to sleep
frtLightweight, easy-to-use wrapper around the Arduino_FreeRTOS_Library
optiboot flashOptiboot subtree for MightyCore, MegaCore, MiniCore and MajorCore
STM32-RFM95-PCBSTM32 and AVR128 Printed Circuit Board for creating IOT nodes with the RFM95 LORA chip
arduinoArduino board definitions for Spacehuhn projects
px-fwlibopen source bare-metal C firmware and documentation for microcontrollers
toolchain68kbuild a toolchain for cross developement. Supports motorola m68k-elf, avr and arm-none-eabi