phpFlickr is a wrapper that allows developers to easily integrate the Flickr API's functions into their PHP applications. The wrapper covers functions for authentication, caching, uploading photos, and replacing photos.
For those who like to dabble with a bit of photo editing but aren't really inclined to pursue more advanced and sophisticated tools like Photoshop, an online photo ending tool like Ribbet may be just what they're looking for. This app may not give you the most groundbreaking features when it comes to cutting edge image editing, but it certainly has appealing functions that are easy to use and easy to access online, allowing users to get really creative with their photos. What's also cool is that developers can integrate this photo editor into their websites, using the Ribbet API.
With use cases in chat, advertising and photo sharing, the Face.com API now estimates the age of the faces it finds in photos. The service released mood detection last July and has seen the number of developers registered on its platform double in less than a year. The age estimation is hardly perfect, but gives a guideline that joins a number of attributes the service can return from just a snapshot.