another vote for Light Flow. takes a little bit to understand what app and configure it, but once done it works extremely awesomely (new word).
u can set priorities to different apps or conditions, like i have low battery as priority 1 with a steady red light so i always know when it's under 15%. i have missed call as #2 with blinking red dot so i always know when i have a missed call. things like email (work) or new texts, tweets, FB notifications etc i have lower based on how important they are to me. great app, well worth it for this phone. works with gosms, too.