Sometimes when you grow accustomed to certain applications they disappear as they’re always there and you use them all the time. In compiling a list of apps that I use every day, I forgot about the ones that are so completely integrated that I don’t really think about them as I just constantly use them. Oddly they are all related to money and time.
I get things done and (frequently) stay within a budget with the following apps for my iPod Touch: OmniFocus, Spend, and Grocery Gadget. Interestingly they all use lists and two of them use the cloud to synchronize the data that they use.