Teensy v2.0 USB Board - ATmega32U4 AVR - Watterott electronic
UNO R3 ATmega16U2 AVR USB Development Main Board from MMM999 on Tindie
UNO R3 ATmega16U2 AVR USB Development Main Board from MMM999 on Tindie
NooGroove USB Board: ATMEGA32 AVR Stick (Minimus AVR) LUFA ATMEGA32U2 Dev USA | eBay
MEGA2560 MEGA 2560 R3 (ATmega2560-16AU CH340G) AVR USB board Development board MEGA2560 for arduino - ASK Electronics
PGM-11801 SparkFun Electronics | Development Boards, Kits, Programmers | DigiKey
2pcs UNO R3 ATmega16U2 AVR USB Development Main Board Geekcreit for Arduino - products that work with official for Arduino boards
Amazon.com: DKARDU AVR ATMEGA16 Minimum System Board ATmega32 Development Board + USB ISP USBasp Programmer ISP ATTiny 51 Board with Download Cable DC Male Cable for ATM : Electronics
Pololu USB AVR Programmer
Pololu USB AVR Programmer v2.1
Kanda - New USB STK200 AVR Kit with board, USB programmer and tutorials.
Atmel ATMEGA32U2 USB Development Board 'NooGroove' AVR USB Demo Stick Minimus US | eBay
Tools and parts : Minimus AVR 32K, programable USB dev kit - SHOP01MEDIA - console accessories and mods, retro, shop - One Stop Shop!
Teensy 2.0 USB AVR development board keyboard mouse ISP disk U experiment B5K2 | Being Patient
Teensy 2.0++ USB AVR Development Board ISP U Disk Keyboard Mouse Experimental S4 | Being Patient
Pololu USB AVR Programmer v2.1
AVR-USB-162
EasyAVR v7 - AVR Development Board with In-System Programmer
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
AVR Atmega16/32 Microcontroller Development Board With USB Programmer Combo