What iPhone apps have I already purchased?

Solution 1:

To re-download all your apps into iTunes.

1. First you need to authorize your iTunes. (Store > Authorize Computer)
2. Next, check for available downloads (Store > Check For Available Downloads)

iTunes will then check for what you have purchased before, and give you an option to re-download your purchased apps.

To see a listing of all the apps you have purchased or downloaded, do this :

1. Go to Store > View My Account
2. Login
3. Click on "Purchase History"

You should now see all the apps you have downloaded before.

Cheers.

Solution 2:

Haven't you received emails with receipts for all the apps you ever purchased? That's the way I know what I got; it also shows you all the free apps, not only the paid apps.