I develop in Qt4, and when you want to use cross-platform notifications without packaging the Growl API within your bundle, it is easiest to use the QStatusBar

I develop in Qt4, and when you want to use cross-platform notifications without packaging the Growl API within your bundle, it is easiest to use the QStatusBar class. I haven't found a more reliable way to display notifications on all three major desktop platforms. Unfortunately it clutters up your status bar.