The free app Advance OS and LED is now packing even more heat. You can already add custom LED alerts, message popups, custom vibration and change your wallpaper, and now things have been tweaked up and v13.0 is sporting a new UI as well as plenty of fixes and updates. The new updates keep this totally free app running in the front of the pack.
Advance OS and LED is truly a great app and you really can't beat the price. If you're at all about customizing your BlackBerry, then you'll definitely want to check this one out. Grab it free in BlackBerry App World and hit the forums for more discussion.