This year has been a busy one for the world of apps.  Here is what we found thanks to Distimo an app company, they looked at data on downloads across all platforms such as iOS and Android, and also factored in the free and paid versions of the apps. Here are the most popular for 2011.

angry birds app

1. Angry Birds

2. Facebook

3. Skype

4. Angry Birds Rio

5. Google Maps

6. iBooks

7. Angry Birds Seasons

8. Fruit Ninja

9. Talking Tom

10. Twitter

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