cntrlc.me - Quickly share text & links between devices - no app required
Notifyr - Receive iOS notifications on your Mac
sharetxt - share text between computers. no installation required
Pusher Beams - Send push notifications programmatically at scale
ShareTXT.LIVE - ShareTXT is a web application that helps you to share text between your browsers and devices in real time.
Muzzle - Silence embarrassing notifications while screensharing