Merge pull request #1712 from markknol/patch-1

Added Haxe section

free-programming-books.md

@@ -59,6 +59,7 @@ Original Source: [List of freely available programming books](http://web.archive
 * [Graphics Programming](#graphics-programming)
 * [Hadoop](#hadoop)
 * [Haskell](#haskell)
+* [Haxe](#haxe)
 * [HTML / CSS](#html--css)
   * [Bootstrap](#bootstrap)
 * [Icon](#icon)
@@ -1140,6 +1141,15 @@ Original Source: [List of freely available programming books](http://web.archive
 * [Yet Another Haskell Tutorial](http://hal3.name/docs/daume02yaht.pdf) (PDF)
 
 
+### Haxe
+
+* [Haxe Manual](http://haxe.org/documentation/introduction/) - Haxe Foundation (PDF, HTML)
+* [Haxe and JavaScript](https://matthijskamstra.github.io/haxejs/) - Matthijs Kamstra (wikibook)
+* [HaxeFlixel Handbook](http://haxeflixel.com/documentation/haxeflixel-handbook/) (HTML)
+* [OpenFL Handbook](https://www.gitbook.com/book/openfl/openfl-documentation/details) 
+* [Flambe Handbook](https://github.com/markknol/flambe-guide/wiki)
+* [Kha Handbook](http://wiki.ktxsoftware.com/wiki/Home)
+
 ### HTML / CSS
 
 * [A beginner's guide to HTML&CSS](http://learn.shayhowe.com/html-css/)