architecture
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AngularJS
backbone
modules management
templating
reviews of some MVC frameworks
UPDATE 1/14/2012: Added Batman.js and Angular.js due to popular demand and because they looked impressive. Over the last several months I have been in a constant search for the perfect javascript MVC framework. Driven by a dire need for the right level of abstraction and features, I have tried out - some more cursorily than others - every framework I could get my hands on. Here lies a brief synopsis of each framework. Lastly, I share the framework which I ultimately decided on. Specifically, the following four features are very important to me:
Designing Javascript APIs - Filepicker.io
We at Filepicker.io spend a lot of time thinking about APIs.