AVR ATMEGA16 Minimum System Board ATmega32 + USB ISP USBasp Programmer For ATMEL | eBay
Pololu USB AVR Programmer
Amazon.com: for ATMEL 51 AVR USB ISP ASP Microcontroller Programmer Downloader with Cable + 10Pin to 6Pin Adapter Board for Ender 3 or Ender 3 Pro Geekstory : Electronics
Universal ATMEL AVR ISP programmer from heilingch on Tindie
Atmel AVR USB Microcontroller Programmer - YouTube
Flash the AVR Atmel ATtiny Chips with a Modified CH341A ISP Programmer
Amazon.com: Waveshare ATMEL AVR Programmer USB AVRISP XPII Compatible Atmel at AVR ISP mk2 mkII in-System Programmer Supports AVR Studio 4/5/6/7 Or Higher Version : Electronics