Here’s a no-PCB Arduino ... and an LED. This is modeled after the Lilypad hardware, and fits nicely on top of the plastic case of the microcontroller, allowing it to be used in a breadboard ...

[Claudio] was working on a homebrew oscilloscope project when he started thinking about how unsuitable a standard breadboard ... Arduino NG, and a pair of level converters. He also added some LED ...

Compatible with Arduino and Raspberry Pi, it can almost meet all your needs. (Without Microcontroller Board) Breadboard and Power Supply Modules-Include various LEDs, resistors, buttons ...