The first thing I thought of that is similar to Rendr is http://meteor.com/ . I'm not sure about how it works with Angular. It does describe itself as a framework where Rendr describes itself as a library, so I'd think it'd be easier to run Angular stuff on top of Rendr.
There's also hoodie + yeoman, but there aren't any adapters for angular yet. For some reason angular doesn't get official love from libraries like rendr and meteor.
