Typeeto - Use Mac’s keyboard to type on iPad, iPhone, Android, etc.
rcmd - rcmd makes app switching instantaneous!When you have a lot of apps open, finding and switching to them might feel too slow using Command-Tab or the Dock.Hold down the right side |⌘ command| and press the first letter of the app name to focus it.
Type2phone - Type2Phone: Use your Mac as keyboard for iOS devices
Charmstone - The quicker switcher launcher for macOS
Mocha Keyboard - Mocha Keyboard is a leading Bluetooth keyboard application for iPad, iPhone, and iPod touch.
SwitchGlass - Customizable app switcher for Mac