scryglass

https://github.com/annkissam/scryglass

Scryglass is a ruby console tool for visualizing and actively exploring objects (large, nested, interrelated, or unfamiliar). You can navigate nested arrays, hashes, instance variables, ActiveRecord relations, and unknown Enumerable types like an expandable/collapsable file tree in an intuitive UI. Objects and child objects can also be inspected through a variety of display lenses, returned directly to the console, and more!