Tuttle
Tuttle is a tool for assisting Rails developers by exposing runtime configuration information for your application. It is similar to the /rails/info/routes and /rails/info/properties information pages or the rake routes and rake middleware tasks.
Tuttle is very much in alpha/proof-of-concept mode. The tuttle-demo project shows it being used in a simple application.
To use...
Add tuttle to you Gemfile
gem 'tuttle', :github => 'dgynn/tuttle', :branch => 'develop'
Add a route to the Tuttle engine
mount Tuttle::Engine, at: "tuttle"
Browse to /tuttle