Bio: c-lightning developer at blockstream!!
The moon clock is a physical timepiece that displays what the moon looks like for your current location. It uses an LED matrix, a RaspberryPi, and a whole bunch of computational astronomy!
Zulip is powerful open-source chat software with a unique nested threading model that makes it really easy to catch up on conversations. We use it every day at RC!
A Golang driver implementation for Bitcoin's lightning network.