Typeeto - Use Mac’s keyboard to type on iPad, iPhone, Android, etc.
Vysor - Vysor lets you view and control your Android on your computer.
1keyboard - Type on your iPhone, iPad or AppleTV using your Mac keyboard
Samsung DeX - Connect your Galaxy S8/S8+ to a monitor
KeyWi - Use your computer's keyboard to type on your iPhone or iPad
AirDroid - Access Android phone/tablet from computer remotely and securely. Manage SMS, files, photos and videos, WhatsApp, Line, WeChat and more on computer.