AmpersandJS

AmpersandJS is the front-end "non-frameworky framework". Some might consider it as Backbone 2.0. Everything is a small CommonJS module published to npm, which follows strict semver. Perfect for nodeJS devs!

Considering all the discontent with AngularJS 2.0, Ampersand is more than a viable alternative for your MEAN stack.

http://ampersandjs.com/
http://blog.andyet.com/2014/08/13/opinionated-rundown-of-js-frameworks