Free Programming eBooks
Ruby:
Clever Algorithms
Data Structures and Algorithms with Object-Oriented Design Patterns in Ruby
Learn Ruby the Hard Way
Learn to Program
MacRuby: The Definitive Guide
Mr. Neighborly’s Humble Little Ruby Book
Programming Ruby
Read Ruby 1.9
Ruby Best Practices
Ruby on Rails Tutorial Book
Javascript:
Building iPhone Apps with HTML, CSS, and JavaScript
Eloquent Javascript
jQuery Fundamentals
Mastering Node
Misc:
Building Accessible Websites
Dive Into HTML 5
The Implementation of Functional Programming Languages
Smooth CoffeeScript
Extracted from this list of 30 books
