ActiveDock is a cydia tweak that makes the iOS Default dock into that found in OSX (in aesthetics.)

The way ActiveDock works is that it alerts you to which applications are running by a small white light underneath the icon. Additionally, ActiveDock will alert you to notifications by making an apps icon bounce for a pre-set time. This means, for example, if you get a new SMS the Messages apps icon will bounce until you check it. There is also an option to make all applications bounce quickly before they launch.