I'm involved with Étoilé, and am the lead developer on a framework called CoreObject (https://github.com/etoile/CoreObject) - it's an object persistence framework something like CoreData except it's also a DVCS.

We're going to properly launch a website for it and do an alpha release in a few weeks, but thought I would mention it since this is where most of the development on Étoilé is happening right now.