Open-source boards designed in KiCad by techinc on GitHub, from 3 repositories. A board’s address here is its repository’s there.
techinc/espbb
ESP-12 / ESP-07 (v2) / ESP-08 (v2) breakout board
techinc/espbb12e
ESP8266 ESP-12{E,F,} breakout board
techinc/mechpad
mechanical keypad