PhotoJAR: Post Thumbnailer displays a post thumbnail. A full gallery can be displayed upon clicking the thumbnail when paired with a javascript viewer. 
PhotoJAR: Post Thumbnail requires PhotoJAR: Base.
For additional info visit <a href="http://www.jarinteractive.com/code/photojar" rel="nofollow ugc">JARinteractive</a>.

PhotoJAR: Post Thumbnail

PhotoJAR: Post Thumbnailer displays a post thumbnail.  A full gallery can be displayed upon clicking the thumbnail when paired with a javascript viewe …

pjgalbraith

Automatically display a default Post Thumbnail image, either the first image attached to a post, or set default images for specific categories, tags, or custom taxonomies. Supports custom fields to ease upgrading.
Includes the SLT File Select plugin created by gyrus (http://www.babyloniantimes.co.uk/index.php?page=donate)
<h3>Documentation</h3>
See documentation at http://www.pjgalbraith.com/2011/12/default-thumbnail-plus/

Default Thumbnail Plus

Add a default thumbnail image to post's with no post_thumbnail set.

PhotoJAR: Post Thumbnail vs Default Thumbnail Plus