I recently came across Brightjourney.
Its design feels a lot like S.E. communities, and it does indeed pay tribute to SE at the bottom of the page:
It makes it seem like the website is a stackexchange community or beta community, but I cannot find anything about it on the area51 website, and the login I use for S.E. doesn't work with it. It also seems to have a different team of developers.
So, I am curious to understand if the people behind Brightjourney just took the framework behind SE to make something different but that looks and feels the same... or if it's a beta in the works of some kind?
I wasn't aware that SE was sharing its resources and would be interested in knowing more if that was the case.