This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.

Psych::JSON::TreeBuilder

        # Psych::JSON::TreeBuilder < Psych::TreeBuilder

(from ruby core)
---
Psych::JSON::TreeBuilder is an event based AST builder.  Events are sent
to an instance of Psych::JSON::TreeBuilder and a JSON AST is
constructed.
---

      

This is MURDOC! A Ruby documentation browser inspired by Smalltalk-80. It allows you to learn about Ruby by browsing through its class hierarchies, and see any of its methods.