Great list, thanks for sharing and gathering! As people said, form to add suggestions would be great. E.g. we're using Umbraco CMS (https://umbraco.com/products/umbraco-cms/) for most of our content managed enterprise solutions and would be awesome to see it listed there. Many many more in my head as well, so might help curating it and growing it for the good of us all looking for OSS alternatives!