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

OpenSSL::ConfigError

        # OpenSSL::ConfigError < OpenSSL::OpenSSLError

(from ruby core)
---
General error for openssl library configuration files. Including
formatting, parsing errors, etc.
---

      

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.