Is there a free resource on how write great documentation?

If you haven't seen it, there's a great community[1] geared toward documentation. Their guide[2] is an excellent starting point on documentation.

1. https://www.writethedocs.org/ 2. https://www.writethedocs.org/guide/

This is an excellent resource. Thanks!

I believe so. I think I have encountered references to them, on HN. I think there was a thread about this, a week or two ago.