Learning Ruby - By Daniel Carrera. Introduces programming, Ruby, assumes familiarity with computers in Unix X Terminal environment, but not Ruby; simple descriptions, many screenshots. Unfinished, but well done and useful for what is done.
Ruby Embedded into C++ - Describes how to embed Ruby interpreter in C++, gives skeleton to build on, treats concepts of embedding, advanced topics like SWIG. Descriptions, code, diagrams, links, news.
Ruby FAQ - Questions and official answers on Ruby.
Ruby Programming - IBM developerWorks group space: articles, podcasts, RSS feeds, courses.
Ruby Tips - Provides coding tips for the language's users.
Ruby User's Guide - Original Japanese version by matz. First English translation by GOTO Kentaro and Julian Fondren. Further translation and editing by Mark Slagell.
RubyCocoa Resources - Documentation and examples, as digital books, for RubyCocoa, a bridge between Ruby and Objective-C, a way to make desktop programs with Ruby.
Ruby-Doc.org - Ruby documentation project: links and downloads of programming information, on many aspects of Ruby.
RubyLearning.com - Set of thorough study notes, and class, for those new to Ruby and meeding a solid introduction to its concepts and constructs. By Satish Talim.
Things That Newcomers to Ruby Should Know - List of most common problems in Ruby, in HTML, text. Table of contents, descriptions, code samples, links. By Bill Tjokroaminata.
