AirDroid - Access Android phone/tablet from computer remotely and securely. Manage SMS, files, photos and videos, WhatsApp, Line, WeChat and more on computer.
Remote Mouse - Turn your smartphone into a wireless touchpad and keyboard now!
Pushbullet - Pushbullet - Your devices working better together
Monect - Make the best use of sensors on smart device to control PC, simulate steering wheel, game-pad...
AirMore - AirMore is a cross-platform toolset that can help you manage any Android device wirelessly.
KDE Connect - Integrate Android with the KDE Desktop