Topic: Gem to display countries information in Rails 4


I am currently working on an application using Rails 4 and have been looking for a gem that can provide to me all the information related to the different countries around the world (at least with the most common) but have not found any. I have taken a look at country_select and carmen but I am not clear about how they work or if they are compatible with rails 4.

Which gems do you recommend me?