The term Agile first appeared in 2001 in the Agile Manifesto. Agile prioritizes short iterations, early delivery, continuous integration, and fast responses to market changes and customers feedback. Since that time, Agile has become incredibly popular and is used by companies such as Google, Electronic Arts, Salesforce and Amazon.
Ruby was developed in the mid-1990s by Yukihiro Matsumoto, as an object-oriented scripting language, which was more robust and flexible than either Python or Perl. The release of the Rails framework in 2004 catapulted Ruby to fame outside Japan and since then a passionate open-source community has developed. Today the language is used in production at many tech companies.