What are some alternatives?
When comparing Yesod and ASP.NET, you can also consider the following products
Ruby on Rails - Ruby on Rails is an open source full-stack web application framework for the Ruby programming...
Apiary - Collaborative design, instant API mock, generated documentation, integrated code samples, debugging and automated testing
Django - The Web framework for perfectionists with deadlines
Backbone.js - Give your JS App some Backbone with Models, Views, Collections, and Events