You’ve probably already used many of the applications that were built with Ruby on Rails: Twitter, Shopify, Airbnb, Groupon, Kickstarter, 500pxBasecamp, GitHub, Twitch, SoundCloud, Indiegogo, Hulu, Zendesk, Square, Highrise, Fiverr, Bloomberg. Those are just some of the big names, but there are literally hundreds of thousands of applications built with the framework since its release in 2004.