Typeeto - Use Mac’s keyboard to type on iPad, iPhone, Android, etc.
Alfred - Alfred is an award-winning app for macOS which boosts your efficiency with hotkeys, keywords, text expansion and more. Search your Mac and the web, and be more productive with custom actions to control your Mac.
Type2phone - Type2Phone: Use your Mac as keyboard for iOS devices
WordReference for Alfred - Multilingual translations at your fingertips!
Mocha Keyboard - Mocha Keyboard is a leading Bluetooth keyboard application for iPad, iPhone, and iPod touch.
Switch for macOS - Keyboard-driven commands to navigate your mac apps faster.