MicroNucleus bootloader upgrade
DuinoKit Tiny - ATTiny85 Arduino Based Discovery Kit by Dan Alich — Kickstarter
Is there any way to remove the 5 seconds programming delay at powerup ?
Homemade Hardware
Repairing bootloader, Introducing Trinket
Programming ATtiny85 IC via USB Using Digispark Bootloader, by Jotrinelectronic
Arduino uno : issue while burning Attiny85 bootloader - Avrdude, stk500, Bootloader issues - Arduino Forum
GitHub - Jasdoge/Attiny85-Bootloader-Tutorial: How to burn a bootloader to an Attiny85 using an Arduino UNO
BURNING BOOTLOADER-Digispark Attiny85 won't recognize USB - IDE 1.x - Arduino Forum
TinySafeBoot, Arduino, and Wireless Upload to ATtiny85 –
Homemade Hardware
Learn To Use ATtiny85 USB Mini Development Board
TinySafeBoot, Arduino, and Wireless Upload to ATtiny85 –