I'll shoot with two examples: (Tooting my own horn) A Fitbit watchface that I wrote a few years back: https://github.com/GWBasic/Binaryish-Clock https://github

I'll shoot with two examples: (Tooting my own horn) A Fitbit watchface that I wrote a few years back: https://github.com/GWBasic/Binaryish-Clock https://github.com/GWBasic/Binaryish-Clock An event/threading library for C#. I keep a fork in my Github because the original source was archived: https://github.com/GWBasic/retlang https://github.com/GWBasic/retlang Note that both examples are "functionally obsolete." The Fitbit studio environment is deprecated in favor of Android Watch; and if you're using C#, you can should be using Tasks to get similar functionality to Retlang.