Amazon.com: USB AVR Programmer w/ 6-Pin 10-Pin IDC ISP Connector for USBASP : Electronics
AN #178 - Software implementation of USB in AVR - MCS Electronics
USB UPDI Programmer PCB for AVR Micrcontrollers - Electronics-Lab.com
Atmel AVRISP STK500 USB ISP Programmer | Seeed Studio Wiki
Connecting Nokia 3310 LCD to USB Using AVR : 9 Steps - Instructables
Tripp Lite UPS 900VA 480W Desktop Battery Back Up AVR 50/60Hz Compact 120V USB RJ11 - UPS - 480 Watt - 900 VA - AVR900U - UPS Battery Backups - CDW.com
Pololu USB AVR Programmer
Arduino AVR C++: Simple USB HID multimedia keyboard based upon standard keyboard class - Stack Overflow
Amazon.com: Geekstory for ATMEL 51 AVR USB ISP ASP Microcontroller Programmer Downloader with Cable + 10Pin to 6Pin Adapter Board for Ender 3 or Ender 3 Pro : Electronics