Pushbullet - Pushbullet - Your devices working better together
TagMango - Book personalized video shoutouts from your favorite people
Pushover - Real-time notifications on your Android, iPhone, iPad, and Desktop
Cameo - Book personalized video shoutouts from your favorite people
Gotify - a simple self-hosted server for sending and receiving messages
Fangage - Helping fans and brands engage with custom made fan portals.