Post your fave apps here and explain what they are along with cost.
I'll start... I have on my iphone Ebay app which is free and very good.. (self explanatory). I use this all the time.
I also have Flixter for movie reviews, cinema locations, times etc this is also free.
I also have a web based app called tv catchup. This is free and lets you view freeview channels on your iphone. Great stuff!!