PubKit is a spinoff project from Pixelfed, and is used by the project’s lead developer to actually develop Pixelfed. It has some pretty great ideas about mocking up entities and data, testing data streams, and working with different server implementations to see where pieces might differ.
I’m pretty sure Dansup is at least 40 senior developers in a trench coat. It makes no sense how many quality projects this guy manages to develop and maintain.
Off the top of my head:
Also he has a proper day job so this is all in his free time. Crazy