Add new MOOC

free-programming-books.md

@@ -481,6 +481,7 @@ Original Source: [Free Programming books](http://stackoverflow.com/revisions/392
 * [MIT OCW](http://ocw.mit.edu/OcwWeb/web/home/home/index.htm)
 * [NPTEL](http://nptel.ac.in/courses.php?disciplineId=106)
 * [Udacity](https://www.udacity.com/)
+* [Platzi](https://courses.platzi.com/)
 
 
 #### Networking