Amazon just made enabling Alexa skills within third-party apps a lot easier. The App-to-App Linking feature and associated Alexa Skill Activation API allow app users to enable an Alexa skill within a third-party app. Prior to the features, users were forced to use the Alexa app to enable a skill.
Skybiometry's cloud-based face detection API serves as a drop-in replacement for face.com's API. This REST-based API can be used in combination with almost any programming language, making it possible to integrate with any device that has internet connectivity.