Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
Libris - Libris is an asset management for photos and videos.
ClassicPress - The WordPress fork. No Gutenberg. Great future!
picinfinity - Picinfinity is an image retaining/proxy site.
TYPO3 - TYPO3.com - Infos, SLAs, Extended Support Versions and more
Imagesocket - A different kind of image hosting