CloudSight - Image recognition API; send an HTTP request with an image, get a description of contents.
Google Arts & Culture - Explore collections of art and culture from around the world, both past and present.
Amazon Rekognition - Add Amazon's advanced image analysis to your applications.
Gratitude Flow - Gratitude Flow is a web extension that allows you to share and receive gratitude on your new tab with real people around the world.
Imagga - Advanced image recognition technology wrapped in powerful API.
New Tab by Flickr - Get a beautiful photo each time you open a new tab