ClassicPress - The WordPress fork. No Gutenberg. Great future!
Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
Tumblr - A feature rich and free blog hosting platform offering professional and fully customizable templates, bookmarklets, photos, mobile apps, and social network integration.
Anchor CMS - Free and lightweight blogging system
TYPO3 - TYPO3.com - Infos, SLAs, Extended Support Versions and more
Pixpa - Pixpa is an all-in-one platform to create beautiful, professional portfolio websites, client galleries and online stores without any coding knowledge.