Hoardr is a simple ruby class for backing up files to Flickr.
Instantiate a new Hoardr object with the source, destination, and gif paths. You'll also need a Flickr API key and Secret, which you can get after creating an app here.
For more info on how the class works read this blog post.
Usage is pretty simple. Code is pretty sloppy.
Check the sample app called "app.rb" for usage examples.