Microsoft Cognitive Services (aka - Project Oxford - https://www.microsoft.com/cognitive-services ) are some machine learning AI API's to give Human Side to your code and a beatiful user experience. These are RESTfull API's and are easily accessible once subscribed.
Offer wide variety of features including -
Optical Character Reading (OCR)
Spell Check
Image Analysis
Detect Age, Gender and Emotion in Image
Entity linking
Text Analytics
and Much more :)