Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
Medium - Welcome to Medium, a place to read, write, and interact with the stories that matter most to you.
ClassicPress - The WordPress fork. No Gutenberg. Great future!
LiveJournal - Online blogging software - free for basic users!
TYPO3 - TYPO3.com - Infos, SLAs, Extended Support Versions and more
Ghost - Ghost is a fully open source, adaptable platform for building and running a modern online publication. We power blogs, magazines and journalists from Zappos to Sky News.