Added openFDA to Health section

README.md

@@ -257,6 +257,7 @@ For information on contributing to this project, please see the [contributing gu
 | Flutrack | Influenza-like symptoms with geotracking | No | No | [Go!](http://www.flutrack.org/) |
 | Makeup | Makeup Information | No | No | [Go!](http://makeup-api.herokuapp.com/) |
 | Nutritionix | Worlds largest verified nutrition database | `apiKey` query string | Yes | [Go!](https://developer.nutritionix.com/) |
+| openFDA | Public FDA data about drugs, devices, and foods | No | Yes | [Go!](https://open.fda.gov/api/) |
 | USDA Nutrients | National Nutrient Database for Standard Reference | No | Yes | [Go!](https://ndb.nal.usda.gov/ndb/doc/index) |
 
 ### Machine Learning