CodeSchool interactive course Getting Started with Ruby
Programming Ruby The Pragmatic Programmers' Guide to Ruby
why’s (poignant) guide to Ruby Crazy Ruby tutorial
Ruby Programming Ruby Programming Wikibook
API docs Ruby, Rails and RSpec documentation with users notes
Ruby style guide Community-driven Ruby coding style
Ruby basics Whirlwind tour to Ruby
http://guides.rubyonrails.org/ Ruby on Rails guides
Agile Web Development with Rails 4 Book about building agile web applications with rails
RailsCasts Screencasts by Ryan Bates
Ruby on Rails tutorial Tutorial by Michael Hartl
Rails style guide Community-driven Rails best practices and style
HTML(5) Tutorial W3Schools HTML tutorial
CSS(3) Tutorial W3Schools CSS tutorial
CSS Reference Extensive CSS reference
Bootstrap CSS Bootstrap CSS documentation
JavaScript path Interactive CodeSchool courses
Eloquent JavaScript Book about JavaScript best practices
JavaScript: The Definitive Guide The bible for JavaScript programmers
jQuery API jQuery API documentation
SQL Tutorial W3Schools SQL tutorial
PostgreSQL Documentation PostgreSQL manual
Try Git Getting started with git
Git book Pro Git book