[Corrspt]

I work mostly with EmberJS (www.emberjs.com) as my Single Page Application (SPA) framework and I really like my productivity.

Ember has 3 core projects (Ember, Ember-CLI, Ember-Data) that deal with Routing, Data Store, Build Tooling, Templates, everything you need to build a SPA application. Things are built to work together so most of the times, things just work.

The framework has been around since 2011 and keeps getting better/modern. I've started an app in 2015, with Ember 1.13, and I've been upgrading since (currently on 3.0).

There are a lot of community addons for most situations (date-pickers, select, deploy, analytics, etc... you can get a sense by browser ember-observer.com)