From the website:
structr is a free, open-source CMS under the GPLv3, written in Java, based on the fantastic NoSQL graph database Neo4j.
If you are curious about a new way creating interactive websites, you should give it a try. But maybe you can even use it for your personal or company website … if you dare.
structr is not yet stable, so please be patient and look out for bugs and minor (or even major) pitfalls.
As the site says, “not yet stable,” but very interesting!