Twitter Mass Follow App
If you need a starter for twitter API or omniauth gem, take a look at this app. You can find sample usages of changing friendship (follow or unfollow) and using search API of twitter.
This basic twitter mass follow/unfollow app has been created for working with twitter API and oauth.
omnioauth library is used for oauth communication, configatron gem is for creating a site config and the famous will_paginate gem is used.