I think you're gonna like Aurelia[1]. It's badass compared to Angular 2, React & Polymer. You get this really, really nice feeling of writing pure Javascript. It's smaller than Angular, strictly follows Javascript standards which is soooo nice.
No
{{bindingVariable}}
but instead:
${bindingVariable} // Just like in Javascript template strings!
Binding? Sure:
<input type="text" value.bind="variable">
Two-way? Of course:
<input type="text" value.two-way="variable">
One time? Yep:
<input type="text" value.one-time="variable">
The templating is so simple, as it follows the APIs as well, for example - how would you bind markdown to the innerHTML of an element? Well, just pass the variable through a ValueConverter in your bind:
<div inner-html.bind="variable | markdown">
It is also pluggable. You can replace almost everything in Aurelia with your own implementation very easily.
Are there any examples using this in the wild? I couldn't find any 'Sites powered by Aurelia' page on the site. Would be interesting to see some full fledged sites (besides the project site).
Well the docs[1] are built using Aurelia, and it's really cool as it fetches the framework API directly from their GitHub repos via GitHub API and caches it on clients computers.
I am currently in the process of re-building our company website with Aurelia (previously Angular 1.X).
[1] - http://aurelia.io/
EDIT: Added a little more to explain my reasoning.