Android: Phone tag is a nerve-racking game, but it's even worse when your friends call you and you don't remember why. bytNotes lets you create reminders tied to specific contacts, so you can remember why they're calling you.
It happens to us all the time: You're supposed to follow up on something with a friend or co-worker, or they say they'll call you later "regarding that thing", and you forget all about it by the time they call. bytNotes lets you leave yourself notes on your phone, tied to a specific contact or group of contacts. That way, when they call you, your phone will give you a little popup reminding you what you wanted to talk to them about (even if that's not why they're calling).
bytNotes is a $1 download for Android devices.