tau
This is my open source, Raspberry Pi - controlled chain of lights hanging in my room. If you want to control the lights, click here
/api
This is the API, accessible via https://tau.onnoeberhard.com/
/cli
This is the command line interface running on the Raspberry Pi. Whenever someone changes the lights, the cli prints it to the screen.
Other Stuff
Here is @MrBesen's binary clock for tau: https://github.com/mrbesen/onnos-uhr