Ruby Tutorial (#4284)

free-courses-en.md

@@ -471,6 +471,7 @@
 ### Ruby
 
 * [Learn how to program: Ruby](https://www.learnhowtoprogram.com/ruby) - Epicodus Inc.
+* [Ruby Tutorial](https://www.w3resource.com/ruby/)
 * [RubyMonk - Interactive Ruby tutorials](https://rubymonk.com)