Most of us have dozens or even hundreds of apps on the iPad, so when a friend buys one and asks us what apps we have installed, we often resort to looking at it and telling them. That is one of the many examples for which Applist helps us.
What Applist does is scan our iTunes library in search of apps, to send that information to its website and in this way save a list with our apps without the need for any registration, since everything is saved in a private url.
It seems great to me and they have also worked on it a lot, since the app is available for Mac and Windows.
Link | app list