A rich text editor that isn't awful, over one thousand free programming books, handle email subscriptions and track emails sent, super easy email unsubscribe, and a cheatsheet for OAuth exploits.
Aimee and Nate talk about UltraHook, Using Capybara in Integration Tests, Background Processing with Einhorn, Barcelona Ruby Conf Top 5, and Raptor.
Unary Operators, Writing fast Ruby, each_with_object, ES6 Transpiler and HStore
RailsRumble, Ruby Motion for Rails devs, how Ruby Hashes work, how to deal with data migrations, clean up your routes file, and get better logs.
Rails data migrations, tools for optimization, Bundler::Updater, using UUID with Postgres, 20,000 Leagues Under Active Record, and Ruby 2.2.0