OS X: Growl, the popular notification software, just hit version 2.0. This major update brings true support for Notification Center, plus the ability to push notifications to your mobile via Prowl or Boxcar.
OS X's Notification Center is pretty great, but few apps actually support it because they've been using Growl for many years while Apple got their act together. Rather than competing, Growl decided to support Notification Center so developers can continue to use Growl and allow you—the user—to choose whether you want your notifications to stay in Growl or get pushed to Notification Center instead. As you can see from the screenshot above, you just have to flip a switch. The major downside is that few, if any apps currently use the Growl 2.0 framework. Developers will need to update the framework in their apps (which, from what the Growl blog suggests, is pretty simple), but once those updates are made you'll get proper control over where your notifications go.
The other big feature in Growl 2.0 is support for Prowl and Boxcar, the mobile notification services. When configuring how you want Growl to display notifications, you can set up Prowl and Boxcar as actions as well.
If you already own the Mac App Store version of Growl, this update is free. If not, it'll cost you $4—a small price for Mountain Lion users.
Growl ($4) | iTunes App Store