Can I add a "me too" to this one! I've been using Wunderlist as a to-do app, and it uses both a different sound and different colour for the LED. I have an almost "pavlov's dog" response to email alerts that use the default sound, and it's nice to be able to distinguish between those and other alerts. With that simple feature I think I could quite happily use Evernote for reminders and only have the one app to deal with.