DIY Arduino Leonardo clone – Dangerous Prototypes

Project: Arduino-based Agilent/Keysight USB-to-IR Adapter to LAN Adapter

nedoCPU-32 through hole PIC32 dev-boards are available – Dangerous Prototypes

Paper Arduino Leonardo - Make

Arduino Leonardo R3 Clone • Make Electronics

What are some cheaper alternatives to the Arduino UNO R3 that have more IO pins and programmability? - Quora

Arduino UNO Clone for DIYers - Updated!! - element14 Community

How to make my own microcontroller like Arduino - Quora

Arduino Beginner and Basic Electronics Kit Primer : 11 Steps (with Pictures) - Instructables

Electronic components set for Arduino - Iduino Botland - Robotic Shop