Today I came across the linkmaker on itunes. This helps us to search iOS apps on the itunes (which is not supported on itunes web by default). Not only the iOS apps here you can search all Music, Movies and all itunes specific stuffs.
When your going to start new application build(development), It is always best idea to check with existing apps and it’s features. We have to say thanks to Apple, they’re providing full search @ linkmaker. Here is the URL http://itunes.apple.com/linkmaker
start type in search text box and then select country you wish.
Setp 2: select Media Type, iOS Apps
and you also select category type and then click search.