This is a simple power supply board for the ESP8266-01.
NOTE: The drill holes for the ESP are too small to solder it directly onto the board! But using a precision socket works fine!
See the wiki for some photos: https://github.com/ikarisan/ESP8266_PowerBoard/wiki
You can order this PCB at OSHPark:
New version: https://oshpark.com/projects/H45RKRgm