Knoto - Send photos to friends automatically using face recognition
Gemini Photos - Clean up your Camera Roll
Face++ - API for face detection – also detects gender, age, pose
PickStackr - Organize and manage your camera roll
Facesoft - The world's most accurate face recognition algorithm
Flic - Flic is a wireless Bluetooth-enabled button that acts as a shortcut to many actions on your wireless phone or other connected device.