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Re:Announcing Amber.js by bruth on Thursday December 08, 2011 @03:07PM (#3330876)
I agree with the same philosophy (or the very least have the ability to control the symmetry of the binding). I have been working on a binding library that allows you to have control over the binding (one-way, two-way) and which objects can be observed. It is simply a framework for defining hooks which provide APIs for defining channels (bindings) between various objects. There are hooks for jQuery, Zepto, Backbone, and plain objects: http://bruth.github.com/synapse/docs/

Disclaimer: I developed Synapse.

Re:Announcing Amber.js by wycats on Thursday December 08, 2011 @04:00PM (#3331098)
Amber supports one-way bindings:

    App.Post = SC.Object.extend({
      fooBinding: SC.oneWay("Bar.baz")
    })