Using the Attiny's Reset Pin without setting Fuse Bits – Arduino, ESP8266, ESP32 & Raspberry Pi stuff
Using Pin 1 on Attiny13/25/45/85 Without Messing With Fuse Bits - Instructables
Technoblogy - Getting Extra Pins on ATtiny
Programming the ATTiny85 using a USBtinyISP programmer
microcontroller - Use the RESET PIN on Attiny85 as Input with voltage divider - Electrical Engineering Stack Exchange
ATTiny Fuse Resetter - element14 Community
ATtiny85 Getting Started Tutorial, and its programming with Arduino
AIHJCNELE Attiny85 Digispark Kickstarter USB Module Development Board Compatible IDE for Arduino General Micro USB MCU Development Module Compatible with UNO R3 PWM I2C SPI ADC I/O with Cable Wire : Amazon.ca: