The best Xbox controllers: Microsoft, Scuf, PowerA, and more - The Verge
Game Controller for Android and iPhone (Lightning) – Razer Kishi V2
Sony could be working on a PlayStation phone controller just like this
Powera Moga XP7-X Plus Bluetooth Controller for Mobile & Cloud Gaming on Android/PC
Razer Wolverine V2 Pro Wireless Review - IGN
Android Gaming Controller – Razer Kishi V2 Pro for Android
Razer Kishi V2 Mobile Gaming Controller for iPhone (Lightning) Xbox Edition: Console Quality Controls - Universal Fit
Razer Kishi V2 Pro Controller - Review
Xbox Gaming Controller for Android
Razer Kishi V2 Pro for Android (Xbox)