Merge pull request #37 from HeitorG/added-apionly.com

added apionly.com

README.md

@@ -89,6 +89,7 @@ A collective list of JSON APIs for use in web development.
 | Github - User Data | Pull public information for a user's github | No | [Go!](https://api.github.com/users/hackeryou) |
 | JSONPlaceholder | Fake data for testing and prototyping | No | [Go!](http://jsonplaceholder.typicode.com/) |
 | RoboHash | Generate random robot/alien avatars | No | [Go!](https://robohash.org/) |
+| API Only | Several APIs free. | No | [Go!](http://apionly.com/) |
 
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