CarrierWave makes it easy and clean to add file uploads to your application. It supports a variety of ORMs, frameworks and image processors. (9 minutes)

Metric Fu, Metrical, SimpleCov, Rails Best Practices, and more are covered in this episode on metrics. (7 minutes)

MetaWhere provides a way to do complex find conditions without SQL in Active Record. MetaSearch makes it easy to create search forms with many find options. (8 minutes)

Password authentication is not too complicated to make from scratch, it will also help to get a better understanding of how it works. (15 minutes)

Rails 3 comes with instrument support through the ActiveSupport::Notifications class. Call "subscribe" to listen to notifications, and "instrument" to send them. (10 minutes)

Learn how to make a site usable offline with HTML 5 localStorage. This last part of the series covers jquery-tmpl and jquery-offline. (14 minutes)

Learn how to make a site usable offline through an HTML 5 cache manifest. This first part of the series covers rack-offline and problems you may run into. (10 minutes)

The new pushState function in JavaScript allows us to change the full URL with AJAX. This means the back button, reloading, and bookmark support can be easily added. (10 minutes)

Creating new gems is easy with the `bundle gem` command. In this episode I will walk you through how this works. (7 minutes)

Gravatar is a service for providing user avatars. See how easy it is to use in Rails in this episode. (5 minutes)