Cross-platform notification center Unification now available on Windows8/RT

Microsoft unveils Live Apps that show info on your lock screen

Lock-screen and new notification icons shown on WP8?

Microsoft rolls out desktop notifications for Hotmail

Rumor: Could this be iOS 5's notification system?

Revamped notifications and widgets coming to iOS 5?

Apple to re-design the iOS notification system [Update]

Google adds email notifications to Wave

Microsoft clarifies WGA Notifications "phone home"

Microsoft's WGA Notifications Service Goes Live