Top Open-Source Static Site Generators
https://staticsitegenerators.net/ has the most comprehensive list of static site generators I've seen.
At this point what we really need is a list of static site generator lists.
Skribilo is missing: http://www.nongnu.org/skribilo/ Guile for the win! :)
Jekyll is used by github, each gitub project can roll its own jekyll blog, therefore its usage numbers are very high.
Java and Java 8 are really the same language at the level of granularity you use for the site :-)
I'm surprised http://www.webhook.com is missing.
Edit: it fails rule #1: "The program must be able to output a static website that can be hosted in places like Netlify, S3 or Github Pages"
No listing for vi/vim/emacs/your-favorite-text-editor?
Seriously - does nobody just do simple HTML sites by hand anymore?
emacs-muse is also missing.
Emacs' org-mode is missing.
is there any one of these that will let me produce blog content like Medium? Really like how easy Medium is to read
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