Add Icon Horse API to Design

README.md

@@ -162,6 +162,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Dribbble](http://developer.dribbble.com/v2/) | Design | `OAuth` | No | Unknown |
 | [Europeana](https://pro.europeana.eu/resources/apis/search) | European Museum and Galleries content | `apiKey` | Yes | Unknown |
 | [Harvard Art Museums](https://github.com/harvardartmuseums/api-docs) | Art | `apiKey` | No | Unknown |
+| [Icon Horse](https://icon.horse) | Favicons for any website, with fallbacks | No | Yes | Yes |
 | [Iconfinder](https://developer.iconfinder.com) | Icons | `apiKey` | Yes | Unknown |
 | [Icons8](http://docs.icons8.apiary.io/#reference/0/meta) | Icons | `OAuth` | Yes | Unknown |
 | [Metropolitan Museum of Art](https://metmuseum.github.io/) | Met Museum of Art | No | Yes | Unknown |