Added link to Desmos

README.md

@@ -95,6 +95,7 @@ We'd also like to publish top entries to our Medium Blog, for even more visibili
 
 ## Resources
 
+* [Desmos Graphing Tool](https://www.desmos.com/calculator)
 * [How To Submit Pull Requests](https://help.github.com/articles/creating-a-pull-request/)
 * [RST Cheatsheet](http://docutils.sourceforge.net/docs/user/rst/quickref.html)
 * [Markdown Cheatsheet](https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet)
@@ -103,4 +104,4 @@ We'd also like to publish top entries to our Medium Blog, for even more visibili
 * [Embedding Math Equations](http://www.sphinx-doc.org/en/stable/ext/math.html)
 * [Sphinx Tutorial](https://pythonhosted.org/an_example_pypi_project/sphinx.html)
 * [Sphinx Docs](http://www.sphinx-doc.org/en/stable/markup/code.html)
-* [Sphinx Cheatsheet](http://openalea.gforge.inria.fr/doc/openalea/doc/_build/html/source/sphinx/rest_syntax.html)
+* [Sphinx Cheatsheet](http://openalea.gforge.inria.fr/doc/openalea/doc/_build/html/source/sphinx/rest_syntax.html)