DrX is a new object inspector for Ruby. It is aimed at programmers who wish to understand Ruby's object model better.

With this inspector, users can double-click a method to launch an editor and position the cursor on the line where the method is defined, and view the features of Ruby objects, including singletons, klass, super and it_tbl.

It can be downloaded from github.

DrX requires the Tk user interface toolkit and MRI Ruby 1.8 or 1.9.