Ruby related links

Core & Important

• The official Ruby Language Website
• The rubygems website
• How to help improving ruby's documentation

Tutorials & Learning

• CodeCademy
• Try Ruby
• Ruby Koans
• Ruby Warrior
• Exercism.io

News

• rubyflow.com
• rubyinside.com
• Planet Ruby
• Planet Ruby (by Gerald Bauer)

Tools & Documentation

• ruby-doc.org - Documentation of core, stdlib
• rdoc.info - Documentation of core, stdlib and gems
• Zenspiders Ruby Quickref. Succinctly covers all of ruby's syntax and some more
• ruby-toolbox.com - Library directory service. Find gems by functionality.
• RegEx Editor
• Pro Git - Book for learning the ins and outs of git.

Ruby Books

• Learn to Program (Ruby version)
• Learn Ruby the Hard Way
• Programming Ruby
• Ruby on Rails Tutorial
• _why's Poignant Guide to Ruby
• Mr. Neighborly's Humble Little Ruby Book
• The Well-Grounded Rubyist, Second Edition (aka Black's Book)
• Eloquent Ruby
• Practical Object-Oriented Design in Ruby (POODR)
• Confident Ruby

Your website is not listed here? Contact us in the #ruby channel on freenode.net. Any of apeiros, atmosx, c-c, jheg will gladly help