Pushover - Real-time notifications on your Android, iPhone, iPad, and Desktop
AirDroid - Access Android phone/tablet from computer remotely and securely. Manage SMS, files, photos and videos, WhatsApp, Line, WeChat and more on computer.
Pushbullet - Pushbullet - Your devices working better together
Droid Transfer - Save and Print your Android Phone Messages, Manage Photos, Music and other files on your Android Phone through your PC. Android Transfer Software.
Gotify - a simple self-hosted server for sending and receiving messages
OpenMTP - OpenMTP is a free and open-source app to transfer files from an Android Phone to macOS.