Added Clash Royale API

README.md

@@ -126,6 +126,9 @@ A collective list of JSON APIs for use in web development.
 | Clash of Clans | Clash of Clans API | No | [Go!](https://developer.clashofclans.com) |
 | Guild Wars 2 | Guild Wars 2 API | No, but `apiKey` query string (for some routes) | [Go!](https://wiki.guildwars2.com/wiki/API:Main) |
 | Minecraft | Minecraft API (For server info & user info) | No |[Go!](https://mcapi.ca/) |
+| Steam | Steam Client API | Yes | [Go!](https://developer.valvesoftware.com/wiki/Steam_Web_API) |
+| Deck of Cards | Deck of Cards API | No | [Go!](http://deckofcardsapi.com/)  |
+| ClashAPI | Clash Royale API | No | [Go!](https://github.com/martincarrera/clash-royale-api)  |
 
 ### Geocoding