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Photo Tagger is now out of beta and available for free. You can check out the app's Facebook page here.
In addition to making tagging faster and more streamlined, Photo Tagger also utilizes the Face Alerts system. Instead of only getting a notification when you are tagged in a photograph by a Facebook user, Face Alerts can identify even untagged photos. You can then visit those photos and confirm (or untag, if it's something you want to hide from mom) your presence.
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Face.com says it has recognized more than 5 million faces in Facebook, which is impressive for a company that has only been around since March.