Update README.md

Author: Eric Elliott

README.md

@@ -78,7 +78,9 @@ Some of these links are affiliate links, meaning that if you make a purchase, I
 * [Slack](http://slack.com) Chat for teams, with GitHub and Google hangouts integration
   * For hangouts, just type /hangout in any channel
 * [PrettyDiff](http://prettydiff.com/)
+* [Babel Repl](https://babeljs.io/repl) The Babel REPL with compiled output
 * [ES6 Fiddle](http://www.es6fiddle.net/)
+* [CodePicNic](https://codepicnic.com/) Embed interactive full-stack snippets & demos
 
 
 ## Building