I use my own software to power this site. It’s a static blogging software app written in TypeScript and it runs under Node.
It’s on GitHub at https://github.com/gordon-ansell/greenhat-sbs.
It’s still very much in development mode at the moment though.
Warning: Static blogging software needs a bit more technical knowledge than things like Wordpress. You need to be comfortable working in a Terminal/Console window and if would be useful if you have some knowledge of (or are prepared to learn) things like HTML, (S)CSS, YAML and how to use HTML templates (SBS uses the Nunjucks templating system).
Documentation is ongoing.