Open-source Static Site CMS
"Publii is a desktop-based CMS for Windows, Mac and Linux that makes creating static websites fast and hassle-free, even for beginners.
Unlike static-site generators that are often unwieldy and difficult to use, Publii provides an easy-to-understand UI, where users can create posts and other site content, and style their site using a variety of built-in themes and options.
What makes Publii even more unique is that the app runs locally on your desktop rather than on the site's server. Available for Windows, Mac, Linux once the app has been installed you can create a site in minutes, even without internet access; since Publii is a desktop app you can create, update and modify your site offline, then upload the site changes to your server at the click of a button."