LifeBandit666: puts lines on the screen for various things. I currently have a battery line across the top of my screen and a signal line across the bottom.
PowerLine - smart line-indicators in your status bar. Battery, CPU, memory, signal, WiFi, storage, SMS, missed calls, network usage and more... Better than a widget! Always visible, even on the lock screen.
FREE version with two indicators, more indicators with the Unlock.