JMS is a CMS based on Angular that is fully configurable through JSON schema-s. JMS is very opinionated especially when it comes to things like templating engines and email services, even though this should be easily interchangeable.
Currently it only supports firestore as its back-end but other implementations are planed and instructions for writing your own integration can be found in the wiki.
A live example can be found here.
For more information consult our wiki.
Note: JMS is in active development and shouldn't be used in a production environment. Progress towards our production ready goal can be tracked here.