Hello! Congratulations on getting an Inspire! Although I cannot recommend any apps, I do recommend rooting and flashing to CyanogenMod 10.1. It is smooth and clean interface, and you can't go wrong. Also, it would be unlocked for you to use on any carrier. I will post links asap.
Edit:
Here is the link for CyanogenMod 10.1:
I'm looking at picking up a used HTC Inspire 4G off eBay and ATT is my carrier. I'm assuming if I was going to CyanogenMod the Inspire, is would not matter if I got bought an ATT locked phone or an unlocked phone off eBay?