Nanoc is a static-site-generator that I wrote and maintain. It started in 2007 and is still going strong. I initially wrote it to use for my personal web site (the one you’re reading right now) and I still use it for that.
I write a lot in Bear, and the import what I wrote into my Nanoc site. See Importing notes from Bear for how I do that.
After 18+ years of using and developing Nanoc, I’got a pretty clear idea of what its strengths and weaknesses are. If I were to start over with Nanoc, or create an entirely new SSG from scratch, those are the things I would pay particular attention to: Issues with Nanoc. See also: Nanoc 5 and my Nanoc 5 wishlist.