Using the Google Maps Javascript API, learn how to plot markers onto a map. Load markers and info windows through AJAX calls to your Rails JSON API.

Mountable Engines are a great way to extract code into its own namespace and allow the code to be reused in other applications. Other popular gems that are mountable engines are Devise and Doorkeeper.

Creating Static Pages within your Rails application is easy and configurable with High Voltage.

Extending the previous episode, we look into making a realtime poll application where users can get live feedback on voting.

Using unobtrusive javascript, we can hide certain fields on forms based on the selected values of other fields.