Delete, Uninstall All Facebook Applications from Profile, Account
If you have been using facebook for over 6 months you might have 50+ applications installed in your facebook account. This is includes the ones you trust and some of them which get installed unknowingly while "allowing" it to use your profile data to calculate your top 5 friends.
Remove Unwanted Applications from Your Facebook Profile
By default, apps have access to your friends list and any information you choose to share with everyone. By installing the you have authorized these apps to interact with your Facebook account in any way they want.
So its not suitable to keep untrusted apps installed to your profile. Here is how you can remove them.
Step 1 : Click on "Account" at top right corner and click on "Privacy Settings".
Step 2 : On the "Choose Your Privacy Settings" page click on the Edit your settings link under "Apps and Websites".
Step 3 : Click on Edit Settings button.
You can also use this link to directly access the apps settings page
Step 4 : On this page you’ll see all the apps that are installed on your facebook profile. Click on the small [x] button to remove them.
Click "Remove" to uninstall the application. Similarly do the same with the rest of them to remove all unwanted facebook applications.
Check out the video screencast below (link) which shows the same …
Hope this helps… let us know if you face any problems in comments below.