add Pony Checkup and Django Hunter to External Resources

README.md

@@ -45,6 +45,8 @@
 * [Django Packages](https://djangopackages.org/) - Comprehensive directory of reusable Django apps and tools.
 * [Classy Class-Based Views](http://ccbv.co.uk/) - Detailed descriptions for each generic class-based view.
 * [Django Sites](https://www.djangosites.org/) - Comprehensive listing of sites built with Django.
+* [Pony Checkup](https://www.ponycheckup.com/) - Security checkups for Django sites.
+* [Django Hunter](https://github.com/6IX7ine/djangohunter) - Tool to help identify incorrectly configured Django applications that are exposing sensitive information. 
 * [William Vincent's Website](https://wsvincent.com) - Up-to-date tutorials on Django and Django REST Framework.
 * [Simple is Better than Complex](https://simpleisbetterthancomplex.com/) - Regularly updated website with many tutorials and tips on Django.
 * [Full Stack Python's Django Page](https://www.fullstackpython.com/django.html) - Explanation of Django philosophy and links to other resources and tutorials.