GData (Atom and RSS in REST style)
Google Client or Web Login
API Mashups (38)
Magic Mosaic provides a fast, user-friendly way to create photo mosaics built from photos in online web albums and photo galleries.
55Photos is a website where users can explore, view, edit, manage, organize, transfer, download, and backup online photos, pictures, and images. 55Photos consumes image-related APIs to aggregate and...
iFiles is the most intuitive file manager for iOS with features like connectivity to many file cloud services, transferring files between computer or cloud services, ability to view many file formats...
In the event that you don't want to work directly with the Picasa RESTful API, then maybe having a Python Library at your disposal will make it easier!
Fotolia Print on Demand
||The Fotolia Print on Demand API allows to integrate image library features into ready to print applications. Requests and responses can be sent and received in JSON and REST formats. Developers can...||Photos||09.25.2015|
||The Fotolia Intranet API allows to access data to search, filter, organize, and download images. Requests and responses are available in REST and JSON formats. Developers can access with API Key. The...||Photos||09.25.2015|
||The pwint.ly API allows merchants to register images and photographs from their own galleries with Pwint.ly's system. Pwint.ly then provides unique URLs which customers can follow to purchase a...||Printing||09.24.2015|
||The Deepomatic REST API allows developers to access and integrate the functionality of Deepomatic with other applications. Some example API methods include creating new objects, managing objects....||Images||09.21.2015|
||The Unsplash API allows developers to integrate their applications with the API services, enabling their users to submit their photos to the Unplash platform directly from the applications....||Photos||09.02.2015|