YOLO - Real-time object detection
Codester - The marketplace for ready-to-use web development assets
Amazon Rekognition - Add Amazon's advanced image analysis to your applications.
CodeCanyon - Scripts and Snippets From $1 for PHP, JavaScript, ASP.NET, CSS, Plugins, HTML5, Mobile and more
CloudSight - Image recognition API; send an HTTP request with an image, get a description of contents.
CodeGrape - CodeGrape is an online marketplace for Themes, WordPress, Plugins, PHP Script, JavaSCript, HTML5, Mobile Apps, Print, Graphic and CSS files.