The Windows Phone app which has gone free next as myAppFree app of the day is Troller Pro.Usually it costs $0.99, but today the download will be FREE for you.
Troller Pro Details:
Take pictures of yourself and your friends, or choose from your gallery!
Insert trolled faces, and share photos and mood with your friends! Photo automatically saved to your phone after you click “Share” or after click button “Save”.
For those who do not know how to add the face. Photo Editor opens first where you can edit the photo, after you click the checkmark will take you to a page where you can add (+), (-), flip (<–>) and share.