Wemos 2812B moaaaar LEDs shield
After seeing RGBW LEDs on the Adafruit stream I quickly went on Aliexpress to buy some and then designed a Wemos D1 shield for them, just not with only one LED.
SMD LED bargraph for breadboards (with Resistors)
A classic, but I was in the mood to design it.
RGB LEDs charlie-plexed pinout
This is basically the layout of one column of a 4x4x4 RGB LED cube...