router • RESTful resources • Actions and views as objects • Actions callbacks • Code sharing • Exception handling • Sessions • Secure Cookies • HTTP Caching • Automatic MIME Types • 20+ Template engines • Partials and layouts • Presenters • Routing helpers • Form helpers • HTML helpers • Automatic markup escape • CSRF and XSS prevention • Force SSL • Entities • Repositories • Data Mapper • SQL and Memory adapters • Dirty Tracking • Reusable validations • Mailers • Multiple environments • Static assets • JSON body parser • Params whitelisting and validation • Code generators • Rack servers support • Application console • Database console • Powerful CLI • Migrations • RSpec, Minitest and Capybara support • Several architectures • And more..