ClassicPress - The WordPress fork. No Gutenberg. Great future!
Greenlight - An app that grades and recommends sustainable shopping.
Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
Eticaly - Find fashion brands that fit your values
TYPO3 - TYPO3.com - Infos, SLAs, Extended Support Versions and more
Renoon - The widest choice of sustainable fashion