Are there any iPython-like shells for Ruby or Rails?

Question

I love iPython and am learning RoR along with some libraries like Mechanize and I'd like to be able to easily see what I'm working with in terms of introspection. I would like to be able to type "." + TAB and see.

Answer 1

There is an irb tool to help autocomplete

require 'irb/completion' 

Answer 2

You should take a look at Pry (an IRB alternative and runtime developer console). It isn't as advanced as the current version of IPython, but it's the most advanced developer console we have in Ruby.