Simple publishing done well
I've had a lot of fun recently playing with Typemill: it's a flat-file, Markdown-supporting CMS that can be used for lots of online publishing tasks, but has a particular focus on generating ebooks.

It's worth noting here that, out-of-the-box, it doesn't seem to be geared toward operating a blog (as someone who spends a lot of time working in the WordPress space, it's natural for me to make that comparison) but, with a little work, it's certainly possible to do this and more.
- It's a great example of keeping things simple (in case of any doubt, I mean this as a massive positive—and not to imply that it is somehow naive, incomplete or trivial): it does just enough to meet most online publishing needs, and leaves the rest to the world of plugins.
- It is highly extensible, and some well-crafted guides and tutorials are available to guide developers through the process.
- The simplicity also shines through when it comes to deployment and development. As a flat-file CMS, no database is needed. Also, despite having a Vue-powered user interface, the build process (to the extent there is one) amounts to running
composer install—no lengthy or complex compilation step—a detail that most needn't care about, but that I noticed and appreciated.
At time of writing, the ecosystem of available themes and plugins is very small indeed, but I think we'll see a steady uptick over time. All in all, a delightfully small, clean and well-crafted solution suitable for lots of common online publishing needs.