Paper-PCBs or Paperboards
Paper-PCBs show all kind of PCBs based on paper print outs combined with standart protoboards.
That site is a sideproject of Wolfgang Spahn. Most boards are developed for and used in his art works like his installations and projections.
Learn to build your own Paper PCBs.
Here are all kind of paper versions of the Arduino.
AVR & Bootloader
If you want or have to burn the bootloader, here are some ways to do so.
Boards for the Raspberry Pi
With the Paper-Duino-Pi the Raspberry Pi as an all purpose artistic tool is now complete. Here you'll find Paperduino boards for all the missing analog and digital in- and outputs.
Here you find boards and shields for the Arduino or your Paperduino.