Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
ClassicPress - The WordPress fork. No Gutenberg. Great future!
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
TYPO3 - TYPO3.com - Infos, SLAs, Extended Support Versions and more
Slack - A messaging app for teams who see through the Earth!