Notifier is an interesting new app to hit App World. The concept of the app is that it sends notifications from your BlackBerry to your PC or Mac from your BlackBerry over Wi-Fi. While there have been apps that do this in the past I am kind of digging the notifications on this one and the use of Wi-Fi. Right now it seems to only do notifications for phone calls, SMS, and battery alerts but hopefully more will come soon with email and the ability to view the email.
There is a desktop and BlackBerry app that work together to make the magic work and for $0.99 it is a pretty cool app. Check out Notifier in App World at this link.