vwbusguy

claremontmckennacollege

This allows the user to embed auto-playing looping Flickr galleries with a simple shortcode using javascript and css (no flash!).
Using the shortcode
The most basic way is to simply use a photoset ID (the admin page will look these up for you):
<pre><code>[simple-flickr set=72157633015103114]
</code></pre>
You can additionally specify height and width, using any valid CSS. It defaults to 500×460, the default Flickr iframe embed (back when that worked…)
<pre><code>[simple-flickr set=72157633015103114 height=500px width=500px]
</code></pre>

Simple Flickr Set

A wordpress plugin for embedding simple slideshows from Flickr photosets.

jmarreros

This Plugin allows to use an external image as Featured Image, this can be especially useful if you house your images in another location.
This Plugin is compatible with Nelio External Featured Image Metadata, so you can reuse your data in case you want to uninstall Nelio Plugin.

External URL Featured Image

It is what I was looking for: simplicity.

$external_image = get_post_meta( $post->ID, '_dcms_eufi_img', true );

Works well for me

Use an external url image as Featured Image for your posts, pages, and other kind of post types.

Simple Flickr Set vs External URL Featured Image