There are 2 repositories under wwvb topic.
A multiband time signal radio transmitter for Raspberry Pi
WWVB 60Khz Full functionality receiver/parser for i2c bus based ES100-MOD
A wspr transmitter/receiver using the QRP Labs arduino shield
Alarmclock based upon a Arduino Uno with an 3.5 inch (320x480) TFT shield.
JJY (WWVB) standard radio wave signal receiver library for Arduino. Arduinoの日本標準時受信モジュール用ライブラリ
mikrobus WWVB Time Signal Receiver Module using ES100-MOD
Synchronize most radio-controlled ("atomic") clocks and watches using almost any phone or tablet
Clock receiver for project RFID-MS, project MOMO and project TAMDL (Animal Mainboards). Is automatically synchronized to a time code transmitted by a radio transmitter connected to a time standard such as an atomic clock.