What are some alternatives?
When comparing Yesod and ember.js, you can also consider the following products
AngularJS - AngularJS lets you extend HTML vocabulary for your application. The resulting environment is extraordinarily expressive, readable, and quick to develop.
Ruby on Rails - Ruby on Rails is an open source full-stack web application framework for the Ruby programming...
Backbone.js - Give your JS App some Backbone with Models, Views, Collections, and Events
Apiary - Collaborative design, instant API mock, generated documentation, integrated code samples, debugging and automated testing
ExpressJS - Sinatra inspired web development framework for node.js -- insanely fast, flexible, and simple