Snarl - Snarl is a notification system for Windows.
8th Wall - Cross-Platform Mobile AR
Notifu - Notifu, a free open source pop-up balloon utility
blippar - Blippar is a revolutionary new image recognition platform that lets you capture a real life image and watch it come to life on your mobile device. Just find images with the blipp logo and unlock a new level of interactivity.
Notify OSD - Canonicals on-screen-display notification agent, implementing the freedesktop.
Vuforia - Leading Augmented Rreality platform.