Add Repl.it to README

README.md

@@ -301,6 +301,7 @@ Before add pull request please see **[this](https://github.com/trimstray/the-boo
 &nbsp;&nbsp;:small_orange_diamond: <a href="https://explainshell.com/"><b>explainshell</b></a> - get interactive help texts for shell commands.<br>
 &nbsp;&nbsp;:small_orange_diamond: <a href="https://jsbin.com/?html,output"><b>jsbin</b></a> - live pastebin for HTML, CSS & JavaScript and more.<br>
 &nbsp;&nbsp;:small_orange_diamond: <a href="http://sandbox.onlinephpfunctions.com/"><b>PHP Sandbox</b></a> - test your PHP code with this code tester.<br>
+&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.repl.it/"><b>Repl.it</b></a> - an instant IDE to learn, build, collaborate, and host all in one place.<br>
 </p>
 
 ##### :black_small_square: Performance