Flickr
Flickr is a popular photo sharing service operated by Yahoo. More information is available at http://flickr.com/.
The following information is required when using Flickr:
- Photoset must be public.
- Only enter the photoset id. For instance if the URL to your set is of the form http://www.flickr.com/photos/{username}/sets/{photosetid}/, you only need to enter photosetid.