Protoduino
That was my the first Arduino clone made with a protoboard in 2010. It's based on the Arduino NG (Nuova Generazione). And was inspired by the Arduino Single-Sided Serial Board. The bootloader was burned with a parallel programmer and the board was programmed with an C-Controll USB to Serial adapter.
License
The Protoduino was designed by Wolfgang Spahn 2010.
It is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.