With the Flickr Node.js library by Mike Kamermans, users can work with authenticated calls and obtain the API route to call methods from a server at no cost. Once the library is loaded, developers have the options to call API functions, call non authenticated functions, proxy the flickr API, upload photos to flickr, download data from flickr, and use flickr data into a different application.
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.
Something new sprang up in the Flickr App Garden last month: "This is my Cam!" by Chris Martin (the San Francisco-based hacker, not that guy from Coldplay). Inspired by music sharing site This Is My Jam and built during Photo Hack Day 3, "This is my Cam!" uses the Flickr API to catalog the different cameras that were used to capture a particular user's photos.
We see a lot of mashups (our directory lists over 4,300 mashups). Lately we've noticed that they've moved beyond your ordinary application. Here is a quick overview of some recent additions that are fun and useful.