I wish, someone would build an OSS CMS on top of Apache Sling. The concepts of JCR and Sling are perfect up to a point, where I don't want to deal with anything

I wish, someone would build an OSS CMS on top of Apache Sling. The concepts of JCR and Sling are perfect up to a point, where I don't want to deal with anything else. If my company had the money, we would instantly buy Adobe AEM licenses. Unfortunately its soooo expensive and they are the only ones who have a CMS frontend for Sling.