We write documentation using Guru and our API is documented in Apiary. We could say our model is described in Apiary. We use Guru to share small pieces of documentation with the team. We think that works better than writing long articles in a wiki or similar.
It should be about documentation only but about modeling ;)
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.