flickpress is a tool to find Flickr photos and insert them into your posts, plus a widget to display recent Flickr photos.
flickpress adds a button to the post editor to find and insert Flickr photos into WordPress posts. Add Flickr users by entering their usernames or email addresses. Previously-entered Flickr users are stored in a database table that can be managed at Tools:flickpress. Search for users' photos by keyword or browse tags, photosets, favorites, or recent photos. You can also search for Creative Commons, Flickr Commons, and government photos. Click through to a photo to insert a variety of sizes, adding a variety of caption information if desired.