Favorite iPhone apps?

[Fontinalis]

I will not consider an iPhone right now because it forces us to be locked into a phone plan that is too expensive, and too binding. No real choices. When those conditions change, I might look into it. So, for now, I'm using an iPod Touch - just like I would use an iPhone - but without the costs of a phone plan.
Using Skype over the net to talk on the phone, local or long distance, to other Skype users or land lines or cell phones.
Given that I run the iPod Touch over the net, utilities to locate wifi network are essential to me. And I have been using WifiTrak and am very happy with it.
Also using an app to monitor the battery : BatteryCharge. Which not only tells you how much juice you have left, but how much time it will take to charge. And what you can do with the charge that is left (translated in hours of surfing, listening to music, etc.)

Other then that,apps that enable me to keep in touch with home when I am away, the apps that enable me to listen to radio stations over the net : Radio-Canada and CBC apps.

I just found out that the REI app does not run on the iPod Touch, only on the iPhone. That's a bummer. :-( I would have looooooved those features about carbon footprint.