Being a user of flickr, I’ve been following the apps that tie in to the service. Nostalgia is definitely interesting as it showcases the power of .Net WPF and a web api like Flickr.
Nostalgia allows you to search flickr remotely and create local sets from the photos you discover. It also supports local photo management and synchronizes to your flickr account, allowing you to update your online photos as well.
Source: nostalgia :: work :: thirteen23