Replying to Share your coolest iPhone apps please

Hello all

I don't know if there have been various threads made on this, but I'll post it anyway.

I bought a 32 gig iPhone over the summer because I like having all my music in one place.

I have a ton of space still left on it. And I need to use some of it instead of just letting it sit there wasted, since I know the iPhone is an incredible piece of technology.

I hear about new apps every days... so please share them with me! I don't care if they are free or not, I'm just looking for some cool new apps.

Ones I already have:
Shazam
TV Guide
SmartSync
Waze Navigation System
the social networking apps (Facebook, Tumblr, etc.)
Ebay
Craigslist
TripAdvisor
Photobucket
Akinator (the genie game)

And that's about it.

Anyone who can help that'd be awesome. Thanks.