AVRDUDE is a utility to program AVR microcontrollers
A set of various projects based on ESP8266, ESP32, ATtiny13, ATtiny85, A...
UPDI programmer software for Arduino (targets Tiny AVR-0/1/2, Mega AVR-0...
AVRDUDE for Windows
AVR cheat sheet for the ATmega328p
TinyCore boards / attiny 1 series Core, Arduino IDE Core, targets ATtiny...