FlickrNet is a .NET library for implementing all of the Flickr API's methods. It is designed to reduce the complexity of calling the API, especially with regards to authentication. This library can be accessed from a variety of frameworks and is written entirely in C#.
Twitter photo sharing service TweetPhoto is encouraging developers to use its platform by giving them a way to earn some money. The service pays developers by the number of photos that its users upload via the TweetPhoto API.