REALLY good travel app?

Hi, does anyone know of a GREAT travel app? I'm looking for something for my iPad for when we leave on my RTW in September. I would LOVE to be able to know, for example, where train stations are (local maps), nearby accomodations,
nearby attractions, and I would LOVE for my family to be able to track our trip as we go!

I've just downloaded TimeTraveler, BreadTrip, Jetsetter ...but I haven't opened them or tried to figure them out yet ...

Any recommendations? Thanks

I'm not familiar with any great ones that are as comprehensive as you're looking for, but here is a list on BnA to get you started, plus links to more at the bottom:

Best 50 Smartphone Apps for Indie Travelers